Test: make autogenerated tests work again

ApplictionSpec and IntegrationSpec: not very meaningful
but working test.
Test: put all test in package test
AbstractService: add dummy unit test
ConferenceService: first outline of the API
ConferenceService: add dummy unit test
FigureService: first outline of the API
Figure: add parameter uuid to apply() in companion object
FigureService: add dummy unit test
Merge branch 'development'

Conflicts:
	test/IntegrationSpec.scala