Robotium 5.2.1 OutOfMemory issues on big projects

[GoogleCodeExporter]

For large projects (300+ test) application started crashing with OOM after 
upgrading to robotium 5.2.1. This never happened before on 4.x versions.

I've investigated memory for leaking objects and looks like there are lots of 
references being kept on activities that were supposed to be closed and 
abandoned. 

Original issue reported on code.google.com by Paul.Tur...@gmail.com on 31 Aug 2014 at 6:39