Check if two parameter values are not equal.
param1 and param2 can be one of the following types:
Group - grp1 != grp2: Check if two groups are not the same.
If either of them is
grpNull, true is returned.
Number - a != b: Checks if a is not equal to b
Object - obj1 != obj2: Check if two objects are not the same.
If either of them is
grpNull, true is returned.
Side - sideA != sideB: Check if two side values are not the same.
String - stringA != stringB: Checks whether two string values are not the same.