Consistent log messages corrections

[adams85]

Describe the purpose of your pull request

Makes ConfigJsonIsNotPresent error handling consistent across SDKs.

Requirement checklist (only if applicable)

• [ ] I have covered the applied changes with automated tests.
• [ ] I have executed the full automated test set against my changes.
• [ ] I have validated my changes against all supported platform versions.
• [ ] I have read and accepted the contribution agreement.

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b918d6d) 99.51% compared to head (9d66b02) 99.51%.

:exclamation: Current head 9d66b02 differs from pull request most recent head 34a32f0. Consider uploading reports for the commit 34a32f0 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #22 +/- ## ======================================= Coverage 99.51% 99.51% ======================================= Files 13 13 Lines 1244 1244 ======================================= Hits 1238 1238 Misses 6 6 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=configcat). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=configcat)

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