minimizing time taken by storage profile test

removed the metadata, hardware, bootstrap config from storage profile
input yaml. These configs are already tested in launcher yaml.

Hopefully this should save us few seconds
replaces an integration test with unit test

Removed an integration test, which used to verify if customization
continues if storage profile is not specified. This test verifies a workflow
scenario which can be tested with unit test.
Merge pull request #145 from alphagov/speeding_integration_tests

minimizing time taken by storage profile test