Merge pull request #359 from atlasapi/cope-with-unrecognised-service-providers

cope with unrecognised service providers when ingesting channels
Lookup using an equivalent content resolver, since it resolves aliases, too.
Additional trace logging
Switch to a KnownTypeQueryExecutor, since it will allow alias lookups
Merge branch 'pa-features' into stage

Conflicts:
	src/main/java/org/atlasapi/remotesite/pa/PaModule.java
	src/main/java/org/atlasapi/remotesite/pa/features/PaFeaturesProcessor.java