Waiting for LB to become active

before adding nodes. Not yet using while removing nodes as using batch
delete is the way to go
creating in a loop instead of waiting for active

since it is possible that even after getting active status, subsequent
call to create/delete results in PENDING_UDPATE error.
Merge branch 'retry_times' into lb_wait_active
using retry_times
tried with tests but not working :(
add_to_load_balancer tests updated - working
Merge branch 'master' into lb_wait_active
log and tests fix
some refactor and additions for add_to_lb tests
remove_from_load_balancer tests implemented
lint fixes
added remove lb logs for testing
test fixes
better func name - thanks @cyli
404 on delete node succeeds - thanks @cyli
Logging all errors
max_retry and interval in global variable for add_to_lb
Merge branch 'master' into lb_wait_active
remove_lb is not retried due to LB ERROR state
lb retry configs taken from config.json - per @wirehead

Also, refactored tests based on suggestions from @cyli