Adding Command as Java director class

Change-Id: If31fba438a62f4a33369468605a16a478d48fc56
Adding Java progress reporting example and test

Change-Id: Ia4c2131b075409c805f495e6cd5e19ba5a78a349
Merge topic 'SimpleITK-478_AddJavaCommandDelegate' into next

f8044d4c Adding Java progress reporting example and test
9a91b23b Adding Command as Java director class