Add SolrIndex to reflective opt loader fast path

Avoid triggering Reflections just to discover ConfigOptions defined on
SolrIndex by including it in the set of hard-coded classes checked by
ReflectiveConfigOptionLoader's `loadStandard` method
Merge branch 'titan05' of github.com:thinkaurelius/titan into titan05
Reduce severity of mundane HBase auth token stuff

The two lines changed from ERROR to INFO in this commit never should
have been at ERROR in the first place.