Add a test for thin pool transition back to "Good" when space is added
Add a test for thin pool transition back to "Good" when space is added

Create a test that:

	Fills thin pool - verify it is handled/reported correctly
 	Verify when space is added the pool state transitions back to Good

Signed-off-by: Todd Gill <7afbb5ba98932b8ffb9cc9e6675c4792db142529@redhat.com>

stratis-storage/stratisd,trgill/stratisd,trgill/stratisd,mulkieran/stratisd,stratis-storage/stratisd,stratis-storage/stratisd,mulkieran/stratisd