PgSQL test setup polish

[uweschaefer]

From @mweirauch on 2019-05-22 21:17:45 +0000 UTC

What this PR does:

• clean up some unused files in in the pgsql store test resources
• adds a slf4j simplelogger.properties for easier debug level toggling
• renames PgEmbeddedConfiguration to PgTestConfiguration to better reflect its purpose

Which issue(s) this PR relates to or fixes:
None.

Notes for the reviewer:

• This PR has no influence on the runtime.
• What does the reviewer think of PR templates? (Inspired by this one.)

Copied from original issue: Mercateo/factcast#438

[uweschaefer]

From @uweschaefer on 2019-05-22 21:25:25 +0000 UTC

thx @mweirauch

[uweschaefer]

From @codecov[bot] on 2019-05-22 21:49:23 +0000 UTC

Codecov Report

Merging #438 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #438   +/-   ##
=======================================
  Coverage   88.98%   88.98%           
=======================================
  Files          78       78           
  Lines        1870     1870           
  Branches      169      169           
=======================================
  Hits         1664     1664           
  Misses        126      126           
  Partials       80       80