Enabling runtime stats for hbase operators This is the first set of changes to collect the runtime stats info for hbase tables and operators. It contains: 1) Populate the estimated row count in hbase access TDB. 2) Collect the hbase access time and accessed row count at the JNI layer (only for select operations now).
Partially reviewed by Mike H. and Selva G.
Removed the part that devides the estimated rows by number of ESPs based on the comments
Changes to support OSS poc. This checkin contains multiple changes that were added to support OSS poc. These changes are enabled through a special cqd mode_special_4 and not yet externalized for general use. A separate spec contains details of these changes. These changes have been contributed and pre-reviewed by Suresh, Jim C, Ravisha, Mike H, Selva and Khaled. All dev regressions have been run and passed.