Submit testcase for IF node testing with |/without Recursion -MAGN-4058

http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-4058 - Scenarios tested
SimpleIF
Array
CustomNode 
CustomNode AS Function Object
IFReturnFunctionObject
IFInputFunctionObject
CustomNode-outputIFFO
Recursion ->
Custom node with a single if and recursion
Custom node with multiple if and recursion
Custom node with nested if and recursion
NoRecursion->
Custom node with a single if, no recursion
Custom node with multiple if and no recursion
Custom node with nested if and no recursion
Custom node with no recursion