Remove extra blank space in ClientSide error msg
Remove extra blank space in ClientSide error msg

This removes the extra blank space in the error message
'Adding a new attribute (%s)s to the root of  the resource
is not allowed'.

Change-Id: I642ec65b3f52d83b01777d71684c37edad4a3553

SauloAislan/ironic,pshchelo/ironic,NaohiroTamura/ironic,pshchelo/ironic,SauloAislan/ironic,NaohiroTamura/ironic,openstack/ironic,openstack/ironic