Updated gradle to use robolectric
Added Testcases for Log
Added tests for Util.java and optimized tests for Log.java
Added test class for ShellCommand.java
Added tests for ShellCommand.java
Added Testcases for CpuArchHelper.java
removed robolectric for now
Updated test cases for CpuArchHelper
Removed unused code + CommonTestCase.java is Abstract class now
Added travis.yml file
Merge branch 'feature/testcases' into develop