Issue 213 navigation gui tests

[Bishares]

resolves #215

• added testuser creation python script
• added testuser deletion python script
• added cypress venv creation and deletion (working for win32 and linux systems)
• fixed cypress testuser seeding

resolves #213

• added Navigation tests (logged in + logged out, 720p + mobile resolution)

[Eixix]

@Bishares Please update the pipeline to use the new cypress testing as well

[Bishares]

@Bishares Please update the pipeline to use the new cypress testing as well

we agreed to do this in a new issue and new branch