Fix multiple requirements for both install and uninstall.
Fix multiple requirements for both install and uninstall.

* Fixed typo when copying requirements file to the temporary file for `pip.install`.
* Handling of the requirements file(s) was totally different on `pip.uninstall` when it the intended result is supposed to be the same(regarding the requirements file of course, not install/uninstall). Fixed it, and to fix it `no_chown` was also added in `pip.uninstall`, if it's needed to install, it should also be needed to uninstall.

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt