Fixed bugs in metrics with labels

[IlyaBaburashvili]

Removed decorators in metrics with labels and moved timing inside function.

[pep8speaks]

Hello @IlyaBaburashvili! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers:

Comment last updated at 2024-02-16 16:38:13 UTC

[codecov[bot]]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (7fe99a6) 97.13% compared to head (321eefc) 97.16%. Report is 11 commits behind head on master.

:exclamation: Current head 321eefc differs from pull request most recent head acfdc38. Consider uploading reports for the commit acfdc38 to get more accurate results

Files	Patch %	Lines
.../decisionengine/framework/engine/DecisionEngine.py	87.91%	6 Missing and 5 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #701 +/- ## ========================================== + Coverage 97.13% 97.16% +0.03% ========================================== Files 51 51 Lines 3172 3214 +42 Branches 518 539 +21 ========================================== + Hits 3081 3123 +42 Misses 56 56 Partials 35 35 ``` | [Flag](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/701/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | Coverage Δ | | |---|---|---| | [python-3.11](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/701/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | `97.13% <87.91%> (+0.03%)` | :arrow_up: | | [python-3.9](https://app.codecov.io/gh/HEPCloud/decisionengine/pull/701/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud) | `97.13% <87.91%> (+0.03%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=HEPCloud#carryforward-flags-in-the-pull-request-comment) to find out more.

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[vitodb]

With this PR now unit tests are happy. Tests for the PR were successful on Jenkins and also running unit tests interactively all tests went through. All test are passing, no more tests got stuck.