Update mysql.yaml (#3310)

* Update mysql.yaml

hotfix for the master branch

Signed-off-by: Julius von Kohout <45896133+juliusvonkohout@users.noreply.github.com>

* Update mysql.yaml

Signed-off-by: Julius von Kohout <45896133+juliusvonkohout@users.noreply.github.com>

* Update mysql.yaml

Signed-off-by: Julius von Kohout <45896133+juliusvonkohout@users.noreply.github.com>

---------

Signed-off-by: Julius von Kohout <45896133+juliusvonkohout@users.noreply.github.com>

Author: juliusvonkohout

applications/katib/upstream/components/mysql/mysql.yaml

@@ -55,7 +55,7 @@ spec:
               command:
               - "/bin/bash"
               - "-c"
-              - "mysql -h 127.0.0.1 -D $$MYSQL_DATABASE -u$$MYSQL_USER_NAME -p$$MYSQL_ROOT_PASSWORD -e 'SELECT 1'"
+              - "mysql -h 127.0.0.1 -D ${MYSQL_DATABASE} -u root -p${MYSQL_ROOT_PASSWORD} -e 'SELECT 1'"
             initialDelaySeconds: 10
             periodSeconds: 5
             failureThreshold: 10