Added karma into node PATH
Added karma into node PATH

Adding the karma-cli package installs it into node_modules/.bin/,
which npm's run command is aware of. As a result, we do not
need to explicitly invoke karma in the package.json's test
commands.

Change-Id: I8679026b72b36aba25a5817d66b3eef9e7411888

markvoelker/refstack,stackforge/refstack,openstack/refstack,markvoelker/refstack,stackforge/refstack,openstack/refstack,markvoelker/refstack,openstack/refstack,markvoelker/refstack,stackforge/refstack,openstack/refstack,stackforge/refstack