suse: add SLESPolicy and fix OpenSuSEPolicy detection

  SuSEPolicy.check() always returns False, requiring concrete subclasses
  to override it. OpenSuSEPolicy never did, and no SLESPolicy existed,
  so both openSUSE and SLES systems fell back to GenericLinuxPolicy which
  uses a no-op PackageManager with an empty package dict. This caused all
  package-gated plugins (rdma, roce, infiniband, etc.) to show as inactive
  regardless of what was installed.

  Add SLESPolicy with os_release_name/os_release_id matching SLES
  /etc/os-release values, and fix OpenSuSEPolicy to override check() via
  LinuxPolicy.check() so both policies are correctly detected and
  RpmPackageManager is used for package lookups.

Signed-off-by: Michael Filanov <mfilanov@nvidia.com>

Author: filanov

sos/policies/distros/suse.py

@@ -61,8 +61,8 @@ def get_local_name(self):
 class OpenSuSEPolicy(SuSEPolicy):
     vendor = "SuSE"
     vendor_urls = [('Community Website', 'https://www.opensuse.org/')]
-    os_release_name = "OpenSuSE"
-    os_release_file = '/etc/SUSE-brand'
+    os_release_name = "openSUSE Leap"
+    os_release_id = "opensuse-leap"
     msg = _("""\
 This command will collect diagnostic and configuration \
 information from this %(os_release_name)s system and installed \
@@ -76,10 +76,31 @@ class OpenSuSEPolicy(SuSEPolicy):
 %(vendor_text)s
 """)
 
-    def __init__(self, sysroot=None, init=None, probe_runtime=True,
-                 remote_exec=None):
-        super().__init__(sysroot=sysroot, init=init,
-                         probe_runtime=probe_runtime,
-                         remote_exec=remote_exec)
+    @classmethod
+    def check(cls, remote=''):
+        return LinuxPolicy.check.__func__(cls, remote)
+
+
+class SLESPolicy(SuSEPolicy):
+    vendor = "SUSE"
+    vendor_urls = [('Distribution Website', 'https://www.suse.com/')]
+    os_release_name = "SLES"
+    os_release_id = "sles"
+    msg = _("""\
+This command will collect diagnostic and configuration \
+information from this %(os_release_name)s system and installed \
+applications.
+
+An archive containing the collected information will be \
+generated in %(tmpdir)s and may be provided to a %(vendor)s \
+support representative.
+
+No changes will be made to system configuration.
+%(vendor_text)s
+""")
+
+    @classmethod
+    def check(cls, remote=''):
+        return LinuxPolicy.check.__func__(cls, remote)
 
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