CLOUDSTACK-4225: Remove additional / in the nfs path

nfs://nfs-server://export/share ->
nfs://nfs-server:/export/share

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-4418: allow egress access to all networks for VMs on NAT

Tests doing operations within guests post VirtualMachine.create w. default
network offering fail since the egress policy with isolated networks and
sourcenat services is DENY.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-4422: Corrected the wrong service paths

Signed-off-by: Prasanna Santhanam <tsp@apache.org>