avoid create credentials related to empty groups

Was confluentinc#1513

Author: piif

roles/variables/defaults/main.yml

@@ -1264,27 +1264,27 @@ _sasl_scram_users: "{
   'client': {
     'principal': 'client',
     'password': 'client-secret'
-  }{% if 'schema_registry' in groups %},
+  }{% if 'schema_registry' in groups and groups['schema_registry']|length > 0 %},
   'schema_registry': {
     'principal': 'schema_registry',
     'password': 'schema_registry-secret'
-  }{% endif %}{% if 'kafka_connect' in groups %},
+  }{% endif %}{% if 'kafka_connect' in groups and groups['kafka_connect']|length > 0 %},
   'kafka_connect': {
     'principal': 'kafka_connect',
     'password': 'kafka_connect-secret'
-  }{% endif %}{% if 'kafka_rest' in groups %},
+  }{% endif %}{% if 'kafka_rest' in groups and groups['kafka_rest']|length > 0 %},
   'kafka_rest': {
     'principal': 'kafka_rest',
     'password': 'kafka_rest-secret'
-  }{% endif %}{% if 'ksql' in groups %},
+  }{% endif %}{% if 'ksql' in groups and groups['ksql']|length > 0 %},
   'ksql': {
     'principal': 'ksql',
     'password': 'ksql-secret'
-  }{% endif %}{% if 'control_center' in groups %},
+  }{% endif %}{% if 'control_center' in groups and groups['control_center']|length > 0 %},
   'control_center': {
     'principal': 'control_center',
     'password': 'control_center-secret'
-  }{% endif %}{% if 'kafka_connect_replicator' in groups %},
+  }{% endif %}{% if 'kafka_connect_replicator' in groups and groups['kafka_connect_replicator']|length > 0 %},
   'kafka_connect_replicator': {
     'principal': 'kafka_connect_replicator',
     'password': 'kafka_connect_replicator-secret'
@@ -1305,27 +1305,27 @@ _sasl_scram256_users: "{
   'client': {
     'principal': 'client',
     'password': 'client-secret'
-  }{% if 'schema_registry' in groups %},
+  }{% if 'schema_registry' in groups and groups['schema_registry']|length > 0 %},
   'schema_registry': {
     'principal': 'schema_registry',
     'password': 'schema_registry-secret'
-  }{% endif %}{% if 'kafka_connect' in groups %},
+  }{% endif %}{% if 'kafka_connect' in groups and groups['kafka_connect']|length > 0 %},
   'kafka_connect': {
     'principal': 'kafka_connect',
     'password': 'kafka_connect-secret'
-  }{% endif %}{% if 'kafka_rest' in groups %},
+  }{% endif %}{% if 'kafka_rest' in groups and groups['kafka_rest']|length > 0 %},
   'kafka_rest': {
     'principal': 'kafka_rest',
     'password': 'kafka_rest-secret'
-  }{% endif %}{% if 'ksql' in groups %},
+  }{% endif %}{% if 'ksql' in groups and groups['ksql']|length > 0 %},
   'ksql': {
     'principal': 'ksql',
     'password': 'ksql-secret'
-  }{% endif %}{% if 'control_center' in groups %},
+  }{% endif %}{% if 'control_center' in groups and groups['control_center']|length > 0 %},
   'control_center': {
     'principal': 'control_center',
     'password': 'control_center-secret'
-  }{% endif %}{% if 'kafka_connect_replicator' in groups %},
+  }{% endif %}{% if 'kafka_connect_replicator' in groups and groups['kafka_connect_replicator']|length > 0 %},
   'kafka_connect_replicator': {
     'principal': 'kafka_connect_replicator',
     'password': 'kafka_connect_replicator-secret'
@@ -1346,27 +1346,27 @@ _sasl_plain_users: "{
   'client': {
     'principal': 'client',
     'password': 'client-secret'
-  }{% if 'schema_registry' in groups %},
+  }{% if 'schema_registry' in groups and groups['schema_registry']|length > 0 %},
   'schema_registry': {
     'principal': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_key}}{% else %}schema_registry{% endif %}',
     'password': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_secret}}{% else %}schema_registry-secret{% endif %}'
-  }{% endif %}{% if 'kafka_connect' in groups %},
+  }{% endif %}{% if 'kafka_connect' in groups and groups['kafka_connect']|length > 0 %},
   'kafka_connect': {
     'principal': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_key}}{% else %}kafka_connect{% endif %}',
     'password': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_secret}}{% else %}kafka_connect-secret{% endif %}'
-  }{% endif %}{% if 'kafka_rest' in groups %},
+  }{% endif %}{% if 'kafka_rest' in groups and groups['kafka_rest']|length > 0 %},
   'kafka_rest': {
     'principal': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_key}}{% else %}kafka_rest{% endif %}',
     'password': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_secret}}{% else %}kafka_rest-secret{% endif %}'
-  }{% endif %}{% if 'ksql' in groups %},
+  }{% endif %}{% if 'ksql' in groups and groups['ksql']|length > 0 %},
   'ksql': {
     'principal': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_key}}{% else %}ksql{% endif %}',
     'password': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_secret}}{% else %}ksql-secret{% endif %}'
-  }{% endif %}{% if 'control_center' in groups %},
+  }{% endif %}{% if 'control_center' in groups and groups['control_center']|length > 0 %},
   'control_center': {
     'principal': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_key}}{% else %}control_center{% endif %}',
     'password': '{% if ccloud_kafka_enabled|bool %}{{ccloud_kafka_secret}}{% else %}control_center-secret{% endif %}'
-  }{% endif %}{% if 'kafka_connect_replicator' in groups %},
+  }{% endif %}{% if 'kafka_connect_replicator' in groups and groups['kafka_connect_replicator']|length > 0 %},
   'kafka_connect_replicator': {
     'principal': 'kafka_connect_replicator',
     'password': 'kafka_connect_replicator-secret'