more flexible perl module naming

- No more presuming 'WWW::' is at the beginning
  (default is now "WWW::SwaggerClient" vs "SwaggerClient" in order
   to accomodate)
- Test that module names Like::This write to the filesystem and in
  the mustache templates properly

modules/swagger-codegen/src/main/resources/perl/api.mustache

@@ -17,7 +17,7 @@
 # NOTE: This class is auto generated by the swagger code generator program. 
 # Do not edit the class manually.
 #
-package WWW::{{moduleName}}::{{classname}};
+package {{moduleName}}::{{classname}};
 
 require 5.6.0;
 use strict;
@@ -27,8 +27,8 @@ use Exporter;
 use Carp qw( croak );
 use Log::Any qw($log);
 
-use WWW::{{moduleName}}::ApiClient;
-use WWW::{{moduleName}}::Configuration;
+use {{moduleName}}::ApiClient;
+use {{moduleName}}::Configuration;
 
 use base "Class::Data::Inheritable";
 
@@ -37,7 +37,7 @@ __PACKAGE__->mk_classdata('method_documentation' => {});
 sub new {
     my $class   = shift;
     my (%self) = (
-        'api_client' => WWW::{{moduleName}}::ApiClient->instance,
+        'api_client' => {{moduleName}}::ApiClient->instance,
         @_
     );