Add configuration options to PostgreSQL

[tommaso-borgato]

This PR:

• deprecates PostgreSQL builder for the postgres image which allows to differentiate images arguments and environment variables
• • adds RedHatPostgreSQL and OfficialPostgreSQL to handle respectively red hat Postgres image and the official Postgres image
• makes the necessary adaptations along the class hierarchy PostgreSQL -> AbstractSQLDatabase -> AbstractDatabase to propagate images arguments and environment variables and preserve default values

Please make sure your PR meets the following requirements:

• Pull Request contains a description of the changes
• Pull Request does not include fixes for multiple issues/topics
• Code is formatted, imports ordered, code compiles and tests are passing
• Code is self-descriptive and/or documented

[tommaso-borgato]

@mchoma can you have a look?

[tommaso-borgato]

@mchoma @simkam Thank you for your review! I hope I've fixed everything you pointed out...

[mchoma]

@mchoma @simkam Thank you for your review! I hope I've fixed everything you pointed out...

Thanks, I have provided second round of review. Of course at the end we will need som CI run to show everything is allright. I assume you will add to description - once editing description please update it as it is out of date.

[tommaso-borgato]

@mchoma Tnks again for your review! I hope I fixed everything you pointed out

[tommaso-borgato]

@mchoma I updated the description; about CI runs, all runs done for the other two related MRs for our CI, have been done using this changes: do you want them linked here too?

[mchoma]

As neither Miroslav not Martin are not around this year anymore, I dare to merge it. Thanks.