Fixed garbled logging messages in PG connector

[sgnn7]

Some of the messages were using the non-formatted output with a
formatting string which was creating pretty unreadable logging output so
these have been fixed now.

What ticket does this PR close?

N/A

Where should the reviewer start?

What is the status of the manual tests?

Have you run the following manual tests to verify existing functionality continues to function as expected?

• Manually tested Keychain provider
• Manually run Kubernetes-Conjur demo with a local Secretless Broker image build of your branch

If this feature does not have any/sufficent automated tests, have you created/updated a folder in test/manual that includes:

• An updated README with instructions on how to manually test this feature
• Utility start and stop scripts to spin up and tear down the test environments
• A test script to run some basic manual tests (optional; if does not exist, the README should have detailed instructions)

Links to open issues for related automated integration and unit tests

N/A

Links to open issues for related documentation (in READMEs, docs, etc)

N/A

Screenshots (if appropriate)

[codeclimate]

Code Climate has analyzed commit 2fd6b3e and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 0.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 48.2% (0.0% change).

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