WIP: DEV: Including EMMO package

[flongford]

This PR experiments with including the European Materials Modelling Ontology EMMO package in the BDSS.

Considering that the ontology is an instance, rather than a library, we much decide where to contain this object as a reference during run time. Initially we have experimented with allocating it as a attribute of the Workflow, since each DataValue object is expected to have a type attribute corresponding to a ontology class. A method should then be constructed to map each DataValue.type attribute to an existing Ontology.<class> object.

This may be combined with similar methods that have been constructed to identify Variable objects from corresponding DataValue instances.

Change log

• Dependencies are updated in the CI for EMMO to be installed through pip
• NOTE: any machine installing force-bdss now MUST have a local installation of JDK. This is currently not checked in the CI
• New ontology attribute on Workflow class

To Do

• Construct method to map ontology classes to DataValue types

[codecov-io]

Codecov Report

Merging #260 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #260   +/-   ##
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  Coverage   96.54%   96.54%           
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  Files          55       55           
  Lines        1536     1536           
  Branches      148      148           
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  Hits         1483     1483           
  Misses         49       49           
  Partials        4        4

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