Fix include of makePyConstructor inside pxr ns.

* Adjusts pxr namespace and Tf_MakePyConstructor not to wrap the import from within
  the opened scopes, but to instead open the namespaced scopes upon each individual
  independent iteration on BOOST_PP_ITERATE.
* Without this fix we recieve the following:
  error: redundant #include of module 'Tf' appears within namespace 'Pixar::Tf_MakePyConstructor':
  #include BOOST_PP_FILENAME_1
  ^
  Tf/makePyConstructor.h:108:1: note: namespace 'Pixar::Tf_MakePyConstructor' begins here:
  namespace Tf_MakePyConstructor {

Package.resolved

@@ -32,8 +32,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/wabiverse/MetaverseKit",
       "state" : {
-        "revision" : "0b302a0a6866d711ea67fc1d44b1e3cb561b3d68",
-        "version" : "1.5.9"
+        "revision" : "ef077ac89695d23e7843e37305fc3bb5ea32205d",
+        "version" : "1.6.0"
       }
     },
     {

Package.swift

@@ -431,7 +431,7 @@ let package = Package(
     ),
   ],
   dependencies: [
-    .package(url: "https://github.com/wabiverse/MetaverseKit", from: "1.5.9"),
+    .package(url: "https://github.com/wabiverse/MetaverseKit", from: "1.6.0"),
     .package(url: "https://github.com/furby-tm/swift-bundler", from: "2.0.9"),
     .package(url: "https://github.com/apple/swift-log.git", from: "1.5.3"),
     .package(url: "https://github.com/apple/swift-syntax.git", from: "509.0.0"),

Sources/Tf/include/Tf/makePyConstructor.h

@@ -306,14 +306,18 @@ template <typename SIG> struct InitCtorWithBackReference;
 template <typename SIG> struct InitCtorWithVarArgs;
 template <typename SIG> struct NewCtor;
 template <typename SIG> struct NewCtorWithClassReference;
+} // namespace Tf_MakePyConstructor
+
+PXR_NAMESPACE_CLOSE_SCOPE
+
 #define BOOST_PP_ITERATION_LIMITS (0, TF_MAX_ARITY)
 #define BOOST_PP_FILENAME_1 "Tf/makePyConstructor.h"
 #include BOOST_PP_ITERATE()
 /* comment needed for scons dependency scanner
 #include "Tf/makePyConstructor.h"
 */
 
-} // namespace Tf_MakePyConstructor
+PXR_NAMESPACE_OPEN_SCOPE
 
 template <typename T>
 Tf_MakePyConstructor::InitVisitor<typename Tf_MakePyConstructor::InitCtor<T>>
@@ -406,6 +410,11 @@ PXR_NAMESPACE_CLOSE_SCOPE
 
 #else // BOOST_PP_IS_ITERATING
 
+PXR_NAMESPACE_OPEN_SCOPE
+
+namespace Tf_MakePyConstructor
+{
+
 #define N BOOST_PP_ITERATION()
 
 #define SIGNATURE R(BOOST_PP_ENUM_PARAMS(N, A))
@@ -587,7 +596,7 @@ struct NewCtorWithClassReference<SIGNATURE> : CtorBase<SIGNATURE> {
   }
 };
 
-#endif
+#endif /* N > 0 */
 
 #undef N
 #undef SIGNATURE
@@ -598,4 +607,8 @@ struct NewCtorWithClassReference<SIGNATURE> : CtorBase<SIGNATURE> {
 #undef ARG_TYPE_STR_A
 #undef EXTRACT_REQ_ARG_A
 
+} // namespace Tf_MakePyConstructor
+
+PXR_NAMESPACE_CLOSE_SCOPE
+
 #endif // BOOST_PP_IS_ITERATING