skipTrash when deleting hbase data in HDFS

This avoids errors when moving data to trash and is probably more
time/space efficient.

When an error occurs here, hbase does not get re-started, and installer
fails due to check it does on the hbase java version.

Change-Id: I96488e23e3d7aeaed7f51d535d101bbdbf5b4c9b