Handling invalid path of workspace register and move

This PS will fix the invalid value handling.
Error will be raised if no/blank value will be specified for
workspace register and workspace move for path parameter.

Change-Id: I0d9956cac27fd4dbb527fd865aa152e4724c01f9
Closes-Bug: #1799883
Partially-Implements: blueprint tempest-cli-unit-test-coverage
3 files changed