Merge branch '1.4.5-SNAPSHOT' of https://git-wip-us.apache.org/repos/asf/accumulo into 1.4.5-SNAPSHOT
ACCUMULO-2176 Ensure scanner is closed.
Merge branch '1.4.5-SNAPSHOT' into 1.5.1-SNAPSHOT

Conflicts:
	core/src/main/java/org/apache/accumulo/core/util/shell/commands/ExecfileCommand.java
Merge branch '1.5.1-SNAPSHOT' into 1.6.0-SNAPSHOT