SDK-1389. Reliability improvements for test SdkTestCloudraidTransfers
SDK-1389. Reliability improvements for test SdkTestCloudraidTransfers

Two downloads each with three exit/resume interruptions
Each download limited to a max of two minutes.
More frequent checks to see if it's time to interrupt, as we were not always getting the full count of 6.

Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk,Acidburn0zzz/sdk