Refactor onosclidriver.py
    -Add exception handling for pexpect exceptions
    -Remove drop_keyspace()
    -Fix expect logic for some functions
    -Fix bug in find_host when rest call fails
Merge branch 'master' of github.com:OPENNETWORKINGLAB/ONLabTest
Merge branch 'master' of github.com:OPENNETWORKINGLAB/ONLabTest

Conflicts:
	TestON/drivers/common/cli/onosclidriver.py