Add SVN provider for downloading dependencies

Git wont allow you to download only one directory from github,
(actually there is a way - with sparse download, but it is complicated),
but svn provides quite simple and user friendly way of downloading directory
from github

resources/lxc_container/meta.yaml

@@ -20,4 +20,9 @@ input:
       value:
     container_name:
       schema: str!
-      value:
+      value:
+    roles:
+      schema: [{value: str}]
+      value:
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_container_create
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_container_destroy

resources/lxc_host/meta.yaml

@@ -11,4 +11,10 @@ input:
       value:
     ssh_user:
       schema: str!
-      value:
+      value:
+    roles:
+      schema: [{value: str}]
+      value:
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/lxc_hosts
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/pip_install
+        - https://github.com/stackforge/os-ansible-deployment/trunk/playbooks/roles/apt_package_pinning