Do not use system properties when setting up solr configuration file

Summary:
Be explicit in specifying the solr home and not rely, java system
properties to specify solr configuration file. This does prevent
JNDI configuration of solr.
Implement white listing of attributes.

Summary:
When reprovisioning assets it is usually the case that we want to delete
most attributes and keep a few. This is the reverse of deleteSomeMeta
Merge pull request #186 from tumblr/bhaskar-implement-whitelist

Implement white listing of attributes.