Update tests to meet new code requirements.
Update tests to meet new code requirements.

Removed test for mobile methods.
Removed test for execute_script (mobile methods are no longer advertised
and non-mobile don't work for Android).

Changed 'android' to :android' in `verify all attributes` as we now
symbolize keys.

SrinivasanTarget/ruby_lib,KazuCocoa/ruby_lib,justin808/ruby_lib,VinceBarresi/ruby_lib,dav/ruby_lib