Merge pull request #154 from ctumwebaze/master

using custom fields for enquiries
@ctumwebaze @mwangiann refactors the FormService

As part of this refactoring;
1. All code that was dealing with form sections in the RapidFtrApplication was  moved to the FormService.
2. All the calls for forms were directed to the FormService which is injected as a dependency with guice.