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>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 732dd2f..dcc190a 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 732dd2f9fadddee35e668c08fe3f15236e32e6ad
+Subproject commit dcc190a885955b03760458ed637749de1dfd3554