testBug324839 failing on Mac (disabled now), testBug372226 fails
randomly

Capture a screenshot in testcase testBug372226 to help analyze why it
fails randomly. 

Change-Id: I0edca4feadf3099d15bd09dfeb2bc9d732886f2a
Signed-off-by: Lakshmi Shanmugam <lshanmug@in.ibm.com>