Utilize Custom Network selector in Apache App

A new control allowing to select existing networks for the instance to
join has been implemented in Ie256c36523c67f27e4cb0b7c9aeed76b2abd28af

This patch modifies Apache HTTP Server application to utilize this
control. It adds it to the "configure instance" dialog step of the
wizard and passes the values returned from the control to the 'networks'
section of instance object in the generated Object Model.

Note, that this also bumps the "Version" of the used UI definition
notaion to 2.1, so this app becomes incompatible with pre-Liberty Murano
releases and with the Murano built from Liberty master prior the landing
of Ie256c36523c67f27e4cb0b7c9aeed76b2abd28af.

Depends-On: Ie256c36523c67f27e4cb0b7c9aeed76b2abd28af

Change-Id: I98ec3ce1992cc6ddbabd3f9ea79891dc952c51a6

ApacheHTTPServer/package/UI/ui.yaml

@@ -10,7 +10,14 @@
 #  License for the specific language governing permissions and limitations
 #  under the License.
 
-Version: 2
+Version: 2.1
+
+Templates:
+  customJoinNet:
+    - ?:
+        type: io.murano.resources.ExistingNeutronNetwork
+      internalNetworkName: $.instanceConfiguration.network[0]
+      internalSubnetworkName: $.instanceConfiguration.network[1]
 
 Application:
   ?:
@@ -26,6 +33,10 @@ Application:
     keyname: $.instanceConfiguration.keyPair
     availabilityZone: $.instanceConfiguration.availabilityZone
     assignFloatingIp: $.appConfiguration.assignFloatingIP
+    networks:
+      useEnvironmentNetwork: $.instanceConfiguration.network[0]=null
+      useFlatNetwork: false
+      customNetworks: switch($.instanceConfiguration.network[0], $=null=>list(), $!=null=>$customJoinNet)
 
 Forms:
   - appConfiguration:
@@ -98,6 +109,12 @@ Forms:
           label: Availability zone
           description: Select availability zone where application would be installed.
           required: false
+        - name: network
+          type: network
+          label: Network
+          description: Select a network to join. 'Auto' corresponds to a default environment's network.
+          required: false
+          murano_networks: translate
         - name: unitNamingPattern
           type: string
           label: Instance Naming Pattern