1. Use NovaScenario parent for Elasticserch scenario and use
_boot_server method for creating server instead of client method.
2. Add server_boot_kwargs args for custom server boot, for example for
defining custom nic.
3. Add action to check server indexed.
4. Add variability flag - search elasticsearch by id or name.
5. Add additional_query arg for better and clarified query results.
Change-Id: Ic889def63bb6e8f535ac9e1aeed9b4f19e6f8823
a596a89457