GCC Puller Primary Key

[MelinaGoula]

What this pull request accomplishes:

• modify create_audited_table() to only create a primary key when a new table is created
• fixes the issue of creating multiple primary keys for a table

Issue(s) this solves:

• GCC Puller: Create primary key only if not exist #900

What, in particular, needs to reviewed:

• gcc_puller_functions.py

What needs to be done by a sysadmin after this PR is merged

• testing of the new code

[chmnata]

Thanks a lot for the update, upon further investigation, the issue seems to be having an unrenamed table in the database, e.g. _loop_detector from a previous failed action. So the duplicated primary key error was alerting about adding the same primary key to the previously unrenamed tabled. This issue was resolved after deleting the unrenamed table in the database.