Fix bug #111 Create Session kw prints Arg type
Fix bug #111 Create Session kw prints Arg type

Convert the max_retries argument to integer using native python method int(), instead of the Robot convert_to_integer keyword. This avoid that garbage message is printed to Robot logs as: Argument types are: <type 'unicode'>
mikepatrick/robotframework-requests,bulkan/robotframework-requests,bulkan/robotframework-requests,oleduc/robotframework-requests