CCSDK propagation of RequestID & PartnrName to AAI

CCSDK propagation of RequestID & PartnrName to AAI

Currently, CCSDK generates a random uuid for every request to AAI using
method getNextTransactionId() in class AAIService.java. A change is made
to first get the RequestId value from MDC and if this is missing, a new
RequestId is generated and set as MDC.
Also, X-FromAppId is set as openECOMP which is very much generic. This
has been changed to CCSDK in file aaiclient.properties

Change-Id: Id269de708919de9dbabd019785e22afa0561abba
Issue-ID: SDNC-68
Signed-off-by: vaibhav.jain1 <vaibhav.jain1@amdocs.com>