Fix warnings/javadocs in sal-distributed-datastore

Fix warnings/javadocs in sal-distributed-datastore

First off, I apologize for the size of this patch. There's a ton of classes
in this project and I didn't even get to all of them (will follow-up). While
a lot of files were touched, the changes were mostly small.

Fixed a lot of checkstyle warnings and cleaned up javadocs. Most of the
warnings/changes were for:
 - white space before if/for/while/catch
 - white space before beginning brace
 - line too long
 - illegal catching of Exception (suppressed)
 - variable name too short
 - indentation
 - missing period after first sentence in javadoc
 - missing first sentence in javadoc
 - missing <p/> in javadoc

Change-Id: Id56d874a8fbcbbc9285279a71c0a5aba393653a9
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>