Add a helper to parse input values to hashes

Planned useage: reading in alternative auth details in specs
Temporary changes and a few new tests

- Named cassettes temporarily disabled
- Alternative endpoint/auth details can be read from the environment
- Tests to create/delete resources added
- Test results modified in some cases to match actual values from the test server
Storage and compute tests cleanup
More adjustments to newly recorded cassettes
Activate the occi+json branch
Simple tests replicated in the occi+json branch
Trigger test outline, minor additions
Comment out forgotten line
Network creation and deletion tests
Getting mixins, currently no os_tpl mixins
Mixin tests beaten into submission
Mixin tests finalized
Essential .connect specs
Using typed exceptions