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>

For musca changes, rename any references to internal_pipeline.

Change-Id: I93bc1ebdae702becde1dbdb8869726b638110b5d
Signed-off-by: Dean Birch <dean.birch@arm.com>

Previously udev_wait_event also allowed to look for different state
changes ("add", "remove", "change"). Now that udev_wait_event is now for
adding devices, create a new helper function for change events only.

The musca actions will need to look for "add" and "change" events.

Change-Id: I60bfc90c4c7688972717291af67083037ecf8da5
Signed-off-by: Dean Birch <dean.birch@arm.com>

To bring this in line with new changes on master, moving objects from
lava_dispatcher/tests to tests/lava_dispatcher. Tidying up affected
import lines.

Also tidying how DownloadAction is instantiated from Musca deploy.

Change-Id: Ibf3b3d5df4eb3038f7e71ce6eb1d495d327beb80
Signed-off-by: Dean Birch <dean.birch@arm.com>

Adding support for Musca boards. Specifically tried with Musca-A board.

Change-Id: I52fd8e5935f517a9deb2e4dca3afaff4ba9a6138
Signed-off-by: Dean Birch <dean.birch@arm.com>