tests: javascript: don't need to manually clear the test working directory

(integrated from komodo (trunk) change 81318 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13399 b87d16e7-d29f-4ee1-b5ec-817d645d335f
tests: python: move environ test into it's own separate class
* this is to avoid conflicts with other tests

(integrated from komodo (trunk) change 81319 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13400 b87d16e7-d29f-4ee1-b5ec-817d645d335f