Set Agent policy according to user provided by test case

Set Agent policy according to user provided by test case

[Bug]           On some occasions tests failed randomly.
[Cause]         Some images (ex. mobile profile on RD-PQ) had other
                services running in the background, which asked Cynara
                for privileges during tests. This caused an incorrect
                behavior of getAgentRequest function (timeout was expected
                to launch client on separate thread, instead a request
                was successfully processed and no timeout occured).
[Solution]      User in CheckData structure now does not depend on a minor
                number.
                setAgentPolicy() has additional argument - user, used to
                filter incoming requests.
[Verification]  Build, install on RD-PQ, run tests multiple times.

Change-Id: Icccf09b8a72929145f624242ace14a60076761a4