fixed 400 Bad Request issue for get single mail:
fixed 400 Bad Request issue for get single mail:

- commented out code until call works as expected again; issue looks like a synchronization problem (request terminates even though java service did not yet execute; resultDTO is undefined and causes problems)
- split into two promises while keeping functionality
- split into additional promises (1 for DB call, 1 for dto transformation, 1 for NER call)
- finished implementation of loading pattern from DB; added some comments

aicirt2012/icm-server,aicirt2012/icm-server