Make the wait_for_server_status timeout message a bit more clear
Make the wait_for_server_status timeout message a bit more clear

The current error message when wait_for_server_status times out only
includes the vm_state but the method, by default, is really waiting for
a state combination of vm_state/task_state.

Sometimes the vm_state is the desired status but the task_state is not,
for example:

"Server 613b9fd8-9f3f-41a6-86cc-a36301aa7fc8 failed to reach ACTIVE
status within the required time (196 s). Current status: ACTIVE."

This patch adds the current task_state to the error message for clarity
when the timeout occurs.

Related-Bug: #1257561

Change-Id: Icfce12035bf4938eac3a13a7b640db4398ef832f

afaheem88/tempest,ntymtsiv/tempest,Lilywei123/tempest,flyingfish007/tempest,rakeshmi/tempest,pczerkas/tempest,Juniper/tempest,tudorvio/tempest,Mirantis/tempest,CiscoSystems/tempest,roopali8/tempest,bigswitch/tempest,manasi24/tempest,pandeyop/tempest,xbezdick/tempest,redhat-cip/tempest,openstack/tempest,flyingfish007/tempest,akash1808/tempest,neerja28/Tempest,cloudbase/lis-tempest,neerja28/Tempest,rzarzynski/tempest,nunogt/tempest,nunogt/tempest,danielmellado/tempest,tonyli71/tempest,tonyli71/tempest,queria/my-tempest,BeenzSyed/tempest,vedujoshi/tempest,redhat-cip/tempest,hayderimran7/tempest,izadorozhna/tempest,varunarya10/tempest,roopali8/tempest,NexusIS/tempest,manasi24/jiocloud-tempest-qatempest,dkalashnik/tempest,CiscoSystems/tempest,cisco-openstack/tempest,zsoltdudas/lis-tempest,hpcloud-mon/tempest,jamielennox/tempest,zsoltdudas/lis-tempest,manasi24/tempest,Tesora/tesora-tempest,jaspreetw/tempest,yamt/tempest,JioCloud/tempest,dkalashnik/tempest,ebagdasa/tempest,alinbalutoiu/tempest,izadorozhna/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,queria/my-tempest,LIS/lis-tempest,Vaidyanath/tempest,vedujoshi/os_tempest,masayukig/tempest,BeenzSyed/tempest,Lilywei123/tempest,armando-migliaccio/tempest,jaspreetw/tempest,Vaidyanath/tempest,hpcloud-mon/tempest,xbezdick/tempest,eggmaster/tempest,tudorvio/tempest,NexusIS/tempest,Mirantis/tempest,alinbalutoiu/tempest,pandeyop/tempest,rakeshmi/tempest,openstack/tempest,ntymtsiv/tempest,Tesora/tesora-tempest,jamielennox/tempest,danielmellado/tempest,yamt/tempest,vmahuli/tempest,bigswitch/tempest,afaheem88/tempest_neutron,manasi24/jiocloud-tempest-qatempest,rzarzynski/tempest,eggmaster/tempest,vedujoshi/os_tempest,afaheem88/tempest,pczerkas/tempest,JioCloud/tempest,LIS/lis-tempest,cloudbase/lis-tempest,armando-migliaccio/tempest,hayderimran7/tempest,masayukig/tempest,vedujoshi/tempest,afaheem88/tempest_neutron,ebagdasa/tempest,sebrandon1/tempest,Juraci/tempest,sebrandon1/tempest,Juniper/tempest,cisco-openstack/tempest,akash1808/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,Juraci/tempest,varunarya10/tempest,vmahuli/tempest