HBASE-6864 fixes from jesse's review.
hbase-7321 comment fix
HBASE-6864 Online snapshots scaffolding
HBASE-7321 Simple flush online snapshot
HBASE-7291 Log roll snapshot [rs]

- Logrollsnapshot uses external->foreign

logroll move due ot o.a.h.h.ss.operation rm
Add LOGROLL style snapshots to protobuf
Adding log roll snapshot test.
[lr] Remove unused field in SnapshotSubprocedure.
- noticed that SnapshotSubprocedure not used by TimestampSnapshotSubprocedure.
[lr] Update to remove dependency on SnapshotSubprocedure
Parallelize the logrollsnapshotssubprocedure.
End-to-end test showing that log roll works (and it is online)
logroll fixes

Fixed test broken due to new default snapshot type.

[lr] grr.. bad comments in log roll.
[lr] move .tableinfo copy to master
[lr] log roll log rolling timing problem fixed, tets pass.
Tweak to force -- had truncated hlogs on clone/restore.
[lr] imports nits
[lr] add debugging to logroll tracker.
[lr] fix cleaners on logroll tests.
[lr] add debugging to logroll snapshot

[lr] regularlize ForeignException

[lr] ignore logroll tests

[lr] ignore restore logroll tests.

log roll tweaks

lr updates

[lr] SnapshotSubprocedurePool fold in.
[lr] cancel -> cancelTasks

fix log roll rssm
HBASE-6866 Timestamp snapshots [regionserver side]

Timestamp Snapshot on the region
  RegionServer side manager and plumbing
  SS Desc utils nits.
  Flush region ts snapshot regionserver side.
  Online SnapshotSubprocedure
  Fixes for making rs side compile

[rs] Remove releaseBarrier subproc no-op
[rs] repackage procedure
[rs] rename externalErrorMonitor -> monitor
[ts] renamed externalErrorMonitor -> monitor

[rs] procedure is now clean.
[rs] nit fix for online exception handling.
[rs] change from localOperationException -> cancel.
[rs] changed constructor args of Subprocedure

[rs] fix spacing nits.
[rs] Comms->Rpcs
[rs] clean up procedure member
[rs] Fixed naming.

[rs] Folded CheckForSwappedStores into FlushRegionAtTimestampTask

[rs] External -> foreign

Pullout rs infrastructure

[ts] get rid of o.a.h.h.s.operation Move Timestamp flush snapshot
[ts] Rename TimestampSnapshotOperation -> TimestampSnapshotSubprocedure
[ts] minor foling of a method in TimestampSnapshotSubprocedure
Enabled TimestanpSnapshotSubproc in RegionServerSnapshotManager
hregion Nit fix.

[ts] comment they goofiness of tableinfo copy.

[ts] Regularize ForeignException

[ts] renames of ForeignExceptions.

[ts] rm Object...

hregion nit.

ts junk

[ts] tweak due to ForeignExceptionListener#receive change.

Conflicts:

	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromClient.java

spacing nit

missing files

[ts] SnapshotSubprocPool foldin.

ts - addition for ts snapshots
HBASE-7490 dev-support script to generate protobuf code
HBASE-7489 TestHCM is racy
'i' before 'e' except for receive
better proc debug messages
only for snaphots that use logs (global, logroll)
global - snapshot description validation.
Updates that need to be weaved back into timestamp and logroll snapshtos
Merge branch 'snapshots-work' into snapshot-work-0103