Changes for discussions in code review:
* Removing run method not required.
* Tweak url deploy schema
* Add in shell support in case it is used.
* Using more appropriate os.path methods.
* Removing unneeded file handle variable

Change-Id: Ib8c603e7c8d9ee0ae154f779599fd6abbe3cd5fe
Signed-off-by: Dean Birch <dean.birch@arm.com>