Change serial0 allocation as false (LP:#1895104)

It hangs during booting when upgrading hardware
version ESXi after deploying image in groovy.
(Current default version is 10)
It could be resolved by adding serial port in VM
when vm version is larger than 10.

Seriaol port1 has been configured as default so
we need to change setting serial0 as false.

live-build/ubuntu-cpc/hooks.d/base/ovf/ubuntu-ova-v1-vmdk.tmpl

@@ -85,7 +85,7 @@
         <rasd:ResourceType>6</rasd:ResourceType>
       </Item>
       <Item ovf:required="false">
-        <rasd:AutomaticAllocation>true</rasd:AutomaticAllocation>
+        <rasd:AutomaticAllocation>false</rasd:AutomaticAllocation>
         <rasd:ElementName>serial0</rasd:ElementName>
         <rasd:InstanceID>4</rasd:InstanceID>
         <rasd:ResourceSubType>vmware.serialport.device</rasd:ResourceSubType>