RA-343: Include Process HL7 task

Added a method that adds Process HL7 task when module is started.

RA-343: Refactored code to use class.getName() instead of string constant.
And formatted code to OpenMRS standards.

Refactored code to use class.getName().equals instead of StringUtils.equals

Instead of using StringUtils.equals() use class.getName().equals()

Added tests that inject mock of SchedulerService to setupHL7ProcessingTask

RA-343: Refactored code according to comments from Darius
Merge pull request #7 from geoff-wasilwa/RA-343

RA-343: Include Process HL7 task