Preclude ensure table exist check which needs create access. fix #619

Create/Admin access is generally available in production scenarios and table creation checks are better avoided.

Most production scenarios would be with a pre-created table with all cfs rightly configured.
remove redundant comment
add pluggable host supplier to Astyanax configuration
Merge branch 'master' of https://github.com/Janarthanam/titan into Janarthanam-master
Rename option HBase "skip-table-creation"

It's now known as skip-schema-check