[patch] code formating and database existence check added for rds

[amitpandey0217]

Description : During mref testing for rds we found few issues related to db check on post sync job.

1. When we create db using pre sync create db job we should be checking if that db is created with that name when we run post sync job .
2. We made common function which can be used during pre and post sync job
3. We made each resource name different as we can have multiple rds instance sharing same resources which will create issues.

Test results:
Mref rds Job:

Mref secrets updated with db name:

Manage rds Job:

Manage secrets updated with db name: