postgresql_script: new module

[Andersson007]

SUMMARY

postgresql_script: new module - Runs SQL statements from a file.

Relates to the discussion in #180 (comment)

The rough plan is:

• Release this module
• Add a deprecation warning to the postgresql_query module about deprecation of the path_to_script and as_single_query options and related ret values. The warning will ask users to use the postgresql_script module
• Update docs in the postgresql_query module
• Announce the deprecation and removal in the next major release (6 months - 1 year)

In this PR:

• Discuss module's interface
• Cover stuff with CI (and maybe unit tests)
• Ask folks for manual testing

After releasing

• Move functions shared between postgresql_query and postgresql_script to module_utils/postgres.py and import them from there.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

postgresql_script

[Andersson007]

FYI: it's not ready for testing at the moment.

[Andersson007]

The next step is adding integration tests. I'll try to do it this-next week.

[Andersson007]

@hunleyd @tcraxs @DanScharon @jtelcontar
the DOCUMENTATION, EXAMPLES, and RETURN sections are mostly done. If you take a look and share your thoughts, it would be great!

[Andersson007]

@hunleyd @tcraxs @DanScharon @jtelcontar the module and tests have been added and are ready for review.
Could you please:

1. review the PR
2. play with the module manually (if you don't have time/wish for that, please scrutinize the tests, see Files changed tab)
3. give feedback, I'll be looking forward to it, AND/OR approve the PR
   Thanks:)

[hunleyd]

didn't have opportunity to pull it down and play with it, but visually it looks ok

[Andersson007]

@hunleyd thank you much for reviewing!