Optimisations in Instrument lists

[dsavchenko]

This PR is a supporting for oda-hub/dispatcher-plugin-nb2workflow#90

• importer.instrument_factory_list is now an iterator that stores instr_factory_list per-plugin (to properly deal with the new one in nb2w plugin).
• Parameter.from_owl_url now accepts Ontology object (for optimisation)
• Optimisation. In all iterations over instrument_factory_list the Instrument object is not built if we don't really need it, instead attributes of the factory function are checked. (Before, all Instrument instances of nb2w plugin were created in every request).

[codecov]

Codecov Report

Attention: Patch coverage is 77.96610% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 61.26%. Comparing base (71c8ae0) to head (dad5c20).

Files	Patch %	Lines
cdci_data_analysis/flask_app/dispatcher_query.py	71.42%	8 Missing ⚠️
cdci_data_analysis/analysis/parameters.py	66.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #661      +/-   ##
==========================================
+ Coverage   61.24%   61.26%   +0.02%     
==========================================
  Files          48       48              
  Lines        8657     8690      +33     
==========================================
+ Hits         5302     5324      +22     
- Misses       3355     3366      +11     

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