added tests for installing dataset and site-wide licenses

[tclose]

There were no tests for the installation of dataset and site-side licenses, in particular for the remote store. These have been added and some fixes applied

[codecov[bot]]

Codecov Report

Attention: 33 lines in your changes are missing coverage. Please review.

Comparison is base (03f22a2) 79.16% compared to head (c92f20d) 79.00%. Report is 25 commits behind head on develop.

Files	Patch %	Lines
arcana/core/cli/deploy.py	48.00%	11 Missing and 2 partials :warning:
arcana/core/data/store/remote.py	80.43%	7 Missing and 2 partials :warning:
arcana/common/data/dirtree.py	33.33%	2 Missing and 2 partials :warning:
arcana/core/deploy/image/app.py	50.00%	2 Missing and 2 partials :warning:
arcana/core/data/set/base.py	88.23%	1 Missing and 1 partial :warning:
arcana/testing/data/store.py	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #177 +/- ## =========================================== - Coverage 79.16% 79.00% -0.17% =========================================== Files 59 59 Lines 5343 5387 +44 Branches 1388 1398 +10 =========================================== + Hits 4230 4256 +26 - Misses 804 822 +18 Partials 309 309 ```

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