Added better version extraction from yum update list - ignoring

everything before :

Signed-off-by: Igor Seletskiy <i@cloudlinux.com>

Author: cloudlinuxadmin

py/kernelchecker.py

@@ -61,7 +61,9 @@ def strip_version(version):
             if part and part[0].isdigit():
                 result += '.'+part
             else:
-                return result
+                break
+        if ':' in result:
+            result = result.split(':')[1]
         return result