Clean up for new code sniffs

[whikloj]

JIRA Ticket: No JIRA, work related to Islandora/islandora#714

What does this Pull Request do?

Brings code in line with new code sniffs and cleans up/reuses some testing infrastructure.

How should this be tested?

Mostly watch for a green on Travis and then check that the tests are being run and really passing.

Additional Notes:

Example:

• Does this change the interface, add a new feature, or otherwise change behaviours that would require updating documentation? no
• Does this change add any new dependencies? no
• Does this change require any other modifications to be made to the repository (ie. Regeneration activity, etc.)? no
• Could this change impact execution of existing code? no

Interested parties

@jonathangreen @Islandora/7-x-1-x-committers

[jonathangreen]

One quick comment:

• Probably worth deleting build.xml

Looks good to me otherwise.

[jonathangreen]

Looking good. Starting ⏰.