Increase scale-out timeout in HEAL02 and HEAL03 tests

Change-Id: Ib56c20d014ab6b9aaa279ef1ed3e2ad0baa32eb1
Signed-off-by: aguilard <e.dah.tid@telefonica.com>

robot-systest/testsuite/heal_02-scale_vdu_healing.robot

@@ -52,7 +52,7 @@ ${nsd_name}   volumes_nativecharm-ns
 ${flavor_name_prefix}   osm.heal02
 ${ns_name}   heal_02
 ${ns_timeout}   6min
-${scale_wait_time}   4min
+${scale_wait_time}   5min
 
 # SSH keys and username to be used
 ${publickey}   %{HOME}/.ssh/id_rsa.pub

robot-systest/testsuite/heal_03-multiple_healing.robot

@@ -52,7 +52,7 @@ ${nsd_name}   volumes_nativecharm-ns
 ${ns_name}   heal_03
 ${ns_config}   {vld: [ {name: mgmtnet, vim-network-name: %{VIM_MGMT_NET}} ] }
 ${ns_timeout}   6min
-${scale_wait_time}   4min
+${scale_wait_time}   5min
 
 # SSH keys and username to be used
 ${publickey}   %{HOME}/.ssh/id_rsa.pub