Update git submodules
* Update docs/submodules/snaps from branch 'master'
- Merge "Created custom exceptions for VM instance creation."
- Created custom exceptions for VM instance creation.
Created VmInstanceSettingsError for errors creating VmInstanceSettings
objects
Created FloatingIpSettingsError for errors creating FloatingIpSettings
objects
Created VmInstanceCreationError for errors creating VM instances
JIRA: SNAPS-132
Change-Id: I588ae34bf066c8440755a8bf4f3721b946533d99
Signed-off-by: spisarski <s.pisarski@cablelabs.com>