KRACOEUS-7604 : Project Income Integrate Mockview -- move view from mock to to budget income

Seems to me the mockviews intentionally being kept in mock dir, so while I  moved  ProposalBudgetIncomePage.xml in to budget income and made some minor changes there. The original mockview is kept without touching.

This commit basically just to move mockview, it has long way to go to make budget project income page work for pd.  I am still learning. 

But doesn't this bean id conflict with the actual mockview bean? I think we should at least remove the mock view and rename all the beans as we are moving this over to the real view. Even if this isn't considered done that should be done at a minimum to separate this from the mockview.