removing mandatory mark for post_creation tab

In launch instance form the post creation tab
having the * symbol, which means the the script
data is mandatory. but this is optional field.

so removing the the * symbol from the
post-creation tab.

Change-Id: If71cdd793723a2777356da773ae12deb68eb55e2
Closes-Bug: #1396501
Merge "removing mandatory mark for post_creation tab"