[Definevalue] Add two constant values.

- ZABBIX_SERVER_ADDRESS
- ZABBIX_API_HEADER
[Setup] Restart process of zabbix and httpd.
[Zabbix] Add skelton file for functions which is used Zabbix API.
[Zabbix] Add a new function: send_data_and_get_response()
[Zabbix] Add a new function: get_authtoken_of_zabbix_server()
[Zabbix] Add a new function: get_linux_servers_group_id()
[Zabbix] Add a new function: get_template_os_linux_id()
[Zabbix] Add a new function: add_monitored_hosts()
[Zabbix] Add a new function: get_zabbix_server_id()
[Zabbix] Add a new function: enable_zabbix_server()
[Setup] Add a new function: start_zabbix_api_functions()
[Zabbix] Compress lines of SEND_CONTENT value.