[DCMEEREQ-88 Identification of Devices in DICOM WebServices]

Added Cache for host/IP AEs to handle the AE get logic and the fallback
AE
Extended the HttpSource to be able to get user info and provide the
hostname resolution by the http server.
[#ARCH-106] After changes to the patient model, MIMA is broken
[#DCMEEREQ-88 Identification of Devices in DICOM WebServices]

Fully implemented
(Tested with ips only and in case of error or unknown map entry or
resolution failure)
(Not tested the name resolution provided by the HttpRequest)