BUG: Fixing Warnings on Macs

* Added std::move(...) where needed
* Fixed shadowed variable in unit test
Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

passed ghostflow-branch-check-release

failed smtk@master-kerbin-windows-shared-release+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

pending smtk@master-norkit-osx-shared-release+examples+matplotlib
failed smtk@master-praxis-windows-shared-release

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

failed smtk@release-moho-linux-shared-relwithdebinfo+remus

running smtk@release-praxis-windows-shared-release

2296:30:41

passed cdash

passed cdash

passed cdash

passed ghostflow-branch-check-master

failed smtk@master-kerbin-windows-shared-release+examples+remus

00:09:22

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+private+remus

00:11:21

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

00:00:04

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

00:11:24

failed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

00:09:51

failed smtk@master-praxis-windows-shared-release

00:13:44

failed smtk@master-talosiv-osx-shared-release+examples+matplotlib

00:15:44

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib

00:09:27

failed smtk@master-tatooine-osx-shared-release+examples+matplotlib+private

00:11:13

failed smtk@release-moho-linux-shared-relwithdebinfo+remus

00:00:05