7 add pytest fixture to extract logs of normalize for testing

[ka-sarthak]

• [x] Add logstash as dev dependency needed to use the nomad logger object
• [x] Add fixtures (capture log and clean up)
• [x] Adjust schema method to work with ClientContext when testing without a server
• [x] Add todo for adding tests for generated jupyter notebook
• [x] Merge the required changes to ClientContext in gitlab nomad-FAIR https://gitlab.mpcdf.mpg.de/nomad-lab/nomad-FAIR/-/merge_requests/1711

[coveralls]

Pull Request Test Coverage Report for Build 8234623209

Details

• 22 of 27 (81.48%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-15.6%) to 84.375%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tests/conftest.py	20	25	80.0%
<!--	Total:	22	27	81.48%	-->

Totals
Change from base Build 8094618267:	-15.6%
Covered Lines:	27
Relevant Lines:	32

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💛 - Coveralls

[ka-sarthak]

@JosePizarro3 I made some changes as we discussed during the review. Please go through them (quick glance should do) and re-approve the PR.