Adapt the test case such that module-load test is done on the module
which is not loaded when the test case is executed.

Adaptation done- Pick any loaded module whose used count is 0, un-load
it and then try to load it from container which is expected to fail.

This is to avoid trying to load a module from the container that is
already loaded which will pass when it is expected to fail.

Signed-off-by: MN Nithin <MN.Nithin@in.bosch.com>