Functional tests not generated correctly for params with array types

[awjh-ibm]

When the metadata for a parameter specifies the type as 'array' functional tests are not generated.

Expected Behavior

It should generated a functional test as it does for types of string, boolean and number.

Actual Behavior

Functional test not generated

Possible Fix

Add an extra else if to handle arrays types, will need to recurse as sub type could also be an array as well as any other type or $ref.

Steps to Reproduce

1. Create a function in chaincode with the @Param annotation specifying an array. For example `@Param('my_param', 'Array')