PCTLIBRARY-935: Adds mechanism to add new view handlers to the view fixture.

ViewFixture.addViewHandler does not allow existing handlers to be
overridden (an INVALID_PARAMETERS error is thrown if this is attempted).
(@ewant)
fixing javadoc paths used in checkSdkStructure task
Merge pull request #476 from janhancic/develop-caplin-patches-viewfixture

PCTLIBRARY-935: Adds mechanism to add new view handlers to the view fixture
Adding coverage for ViewFixture.js which includes the addViewHandler enhancement from @janhancic #476
Adding additional functionality for adding viewhandlers to the ComponentFixture (and tests)
CC: @janhancic
making i18n content plugin text/javascript so its included in the composite bundle (#502)
Merge branch 'develop' into test-suite-cleanup-and-refactoring