BUG 428 remove importing unnecessary imports

List of imports is created from all GeneratedTypes which were used while
generating interface or class.

Fully qualified name is always used for classes which belongs to
java.lang.* package

Change-Id: I14dcf1bd852ef596c6001c5bf2ffeac9a65d962b
Signed-off-by: Jozef Gloncak <jgloncak@cisco.com>
Merge "BUG 428 remove importing unnecessary imports"