Fix warnings/javadocs in sal-distributed-datastore

Fix warnings/javadocs in sal-distributed-datastore

Fixed checkstyle warnings in the entity ownershiop classes. 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: I34d130d5f50751222d89a0b36c132bd270aba156
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>