Add BMC IP configured and format checking

Change-Id: I43114311f85089ca9be09ce578e3dfea3fc0abdc
Signed-off-by: ppeng <peng.peng@windriver.com>

keywords/bmc/ipmitool/chassis/power/ipmitool_chassis_power_keywords.py

@@ -1,3 +1,5 @@
+import ipaddress
+
 from config.configuration_manager import ConfigurationManager
 from framework.ssh.ssh_connection import SSHConnection
 from keywords.base_keyword import BaseKeyword
@@ -18,6 +20,13 @@ class IPMIToolChassisPowerKeywords(BaseKeyword):
             self.bm_ip = node.get_bm_ip()
             self.bm_username = node.get_bm_username()
 
+            if not self.bm_ip or self.bm_ip == "None":
+                raise ValueError("BMC IP address is not configured or is None")
+            try:
+                ipaddress.ip_address(self.bm_ip)
+            except ValueError:
+                raise ValueError(f"Invalid BMC IP address format: {self.bm_ip}")
+
     def _power_off(self, bm_ip: str, bm_username: str, bm_password: str):
         """Powers off the host using IPMI tool