add utopic & vivid nodesets

spec/acceptance/nodesets/ubuntu-14.10-x86_64-docker.yml

+HOSTS:
+  ubuntu-1410-x64:
+    default_apply_opts:
+      strict_variables:
+    platform: ubuntu-14.10-amd64
+    hypervisor : docker
+    image: ubuntu:14.10
+    # This stops the image from being deleted on completion, speeding up the process.
+    docker_preserve_image: true
+CONFIG:
+  type: foss
+  log_level: debug

spec/acceptance/nodesets/ubuntu-14.10-x86_64-openstack.yml

+HOSTS:
+  ubuntu-1410-x64:
+    default_apply_opts:
+      strict_variables:
+    platform: ubuntu-14.10-amd64
+    hypervisor : openstack
+    flavor: m1.small
+    image: ubuntu-1410-latest
+    user: ubuntu
+CONFIG:
+  type: foss
+  log_level: debug
+  openstack_network: default

spec/acceptance/nodesets/ubuntu-15.04-x86_64-docker.yml

+HOSTS:
+  ubuntu-1504-x64:
+    default_apply_opts:
+      strict_variables:
+    platform: ubuntu-15.04-amd64
+    hypervisor : docker
+    image: ubuntu:15.04
+    # This stops the image from being deleted on completion, speeding up the process.
+    docker_preserve_image: true
+CONFIG:
+  type: foss
+  log_level: debug

spec/acceptance/nodesets/ubuntu-15.04-x86_64-openstack.yml

+HOSTS:
+  ubuntu-1504-x64:
+    default_apply_opts:
+      strict_variables:
+    platform: ubuntu-15.04-amd64
+    hypervisor : openstack
+    flavor: m1.small
+    image: ubuntu-1504-latest
+    user: ubuntu
+CONFIG:
+  type: foss
+  log_level: debug
+  openstack_network: default