Netstd generator produces uncompileable code for enums ending with "_result" or "_args"

When the .thrift files contains an enumeration whose name contains "_result", the generated code contains "Result" except in the definition of the enum itself, preventing the code from compiling successfully.

Since other enumerations are generated preserving the case and underscores, I believe the issue lies on the usage side and not definition.

Provided example (generated with netstd:no_deepcopy) shows the case where the enum in used as a return value but the issue is the same when used as parameter or inside a struct.

I observed this issue with the current HEAD and checked that it already existed in 0.14.2.

I will take a look and try to propose a patch.