SSH Runner: Fix several issues and refactor code #259

Job	Run time
Deploy to TestPyPI	0s
Windows test suite / Unit & Integration Tests (3.13)	15m 29s
Windows test suite / Unit & Integration Tests (3.8)	17m 59s
Linux test suite / Build Linux container	5s
Windows test suite / Unit & Integration Tests (3.6)	17m 49s
OSX test suite / Setup and Cache Dependencies	1m 59s
Windows test suite / Functional Tests (3.13)	44m 5s
Windows test suite / Functional Tests (3.8)	46m 58s
Windows test suite / Functional Tests (3.6)	45m 7s
Linux test suite / Runner Tests (3.13)	1m 28s
Linux test suite / Unit Tests (3.13)	1m 52s
Linux test suite / Runner Tests (3.9)	5m 10s
Linux test suite / Integration Tests (3.13)	3m 49s
Linux test suite / Functional Tests (3.13)	5m 28s
Linux test suite / Unit Tests (3.9)	1m 38s
Linux test suite / Integration Tests (3.9)	4m 20s
Linux test suite / Functional Tests (3.9)	5m 46s
Linux test suite / Unit Tests (3.8)	1m 37s
Linux test suite / Integration Tests (3.8)	4m 18s
Linux test suite / Functional Tests (3.8)	6m 11s
Linux test suite / Unit Tests (3.6)	1m 45s
Linux test suite / Integration Tests (3.6)	4m 45s
Linux test suite / Functional Tests (3.6)	5m 59s
OSX test suite / Unit Tests (3.8)	1m 40s
OSX test suite / Integration Tests (3.8)	4m 6s
OSX test suite / Functional Tests (3.8)	19m 47s
OSX test suite / Unit Tests (3.12)	50s
OSX test suite / Integration Tests (3.12)	2m 45s
OSX test suite / Functional Tests (3.12)	21m 11s
OSX test suite / Unit Tests (3.13)	40s
OSX test suite / Integration Tests (3.13)	2m 5s
OSX test suite / Functional Tests (3.13)	19m 54s
Code coverage	0s
	5h 16m 35s

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