add a SolrCloud collection instance directory, hbase-collection1

generated by $ solrctl instancedir --generate hbase-collection1
simplify schema.xml of hbase-collection1
add config files for Lily HBase Indexer

morphlines.conf: service-wide Morphlines configuration file.
morphline-hbase-mapper.xml: indexer specific configuration file
  (indexer for tweets_hbase HBase table).