Stop hbase first in swstopall, so that it can flush its memstore.

The swstopall script needs to stop HBase first, if HBase uses
HDFS as its file system, so that HDFS is still available for it
to get a clean shutdown.

Change-Id: I5264f7c0be1b9e6047b818399f4208d5f4f12180
Merge "Stop hbase first in swstopall, so that it can flush its memstore."