BZ 984188 -unifying UI for creation of new datasource / data provider

Proposed fix for https://bugzilla.redhat.com/show_bug.cgi?id=984188
1) Changed "New DataSource" link text in data source manage panel to have the same text as in Data Providers panel.

2) Changed rendering of Data provider create/edit form to use the same style of title as used in Data Source Manager panel.