improve design of health area
change character color in case of short vnodes exist
change color in case of lost vnodes existence
use table sorter
update tablesorter to v2.16.2
improve design and get_routing_list method of different type
add ROMA env check in rspec
try to rbalse test
add cluster.css
remove unecessary scss comment
improve design[button, Table]
Merge remote-tracking branch 'remotes/origin/ph3_rspec' into ph3
change logic of get_instances_list & get_instance_info
adjust rspec to new logic
modify design & class name & method name
change variable name(rlist => routing_list)
finish to develop Cluster info page