Let provisioning finish if script fails

This will allow cleanup to succeed even if the provisioning script
fails, avoiding leaving the system in a weird state.

client-api/api_lib/pvcapi_provisioner.py

@@ -1291,6 +1291,7 @@ def create_vm(self, vm_name, vm_profile, define_vm=True, start_vm=True):
             script_arguments[argument_name] = argument_data
 
         # Run the script
+        try:
             installer_script.install(
                 vm_name=vm_name,
                 vm_id=vm_id,
@@ -1299,6 +1300,8 @@ def create_vm(self, vm_name, vm_profile, define_vm=True, start_vm=True):
                 networks=vm_data['networks'],
                 **script_arguments
             )
+        except:
+            continue
 
     # Phase 9 - install cleanup
     #  * Unmount any mounted volumes