COMP: Update external projects to use CMAKE_CACHE_ARGS

Unless option have to be passed using the command line, this is the
recommended approach to pass options. It avoids "command line length issues".

CMake/External/External_Assimp.cmake

@@ -6,7 +6,7 @@ imstk_add_external_project( Assimp
   GIT_REPOSITORY https://github.com/assimp/assimp.git
   GIT_TAG v3.3.1
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DASSIMP_BUILD_ASSIMP_TOOLS:BOOL=OFF
     -DASSIMP_BUILD_TESTS:BOOL=OFF
     -DASSIMP_NO_EXPORT:BOOL=ON

CMake/External/External_GoogleTest.cmake

@@ -6,7 +6,7 @@ imstk_add_external_project( GoogleTest
   GIT_REPOSITORY https://github.com/google/googletest.git
   GIT_TAG release-1.8.0
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DBUILD_GMOCK:BOOL=ON
     -DBUILD_GTEST:BOOL=ON
     -DBUILD_SHARED_LIBS:BOOL=ON

CMake/External/External_LibNiFalcon.cmake

@@ -11,7 +11,7 @@ imstk_add_external_project( LibNiFalcon
   GIT_REPOSITORY https://github.com/agirault/libnifalcon
   GIT_TAG 47586d4e21c987fb9e3ce822bf707c53e8fc4e52
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DBUILD_TESTING:BOOL=OFF
     -DBUILD_EXAMPLES:BOOL=OFF
     -DBUILD_SWIG_BINDINGS:BOOL=OFF

CMake/External/External_SCCD.cmake

@@ -6,7 +6,7 @@ imstk_add_external_project( SCCD
   GIT_REPOSITORY https://gitlab.kitware.com/iMSTK/SCCD.git
   GIT_TAG 64550894016d84e80939a1c51ef6df5307c54fae
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DBUILD_SAMPLE_APP:BOOL=OFF
   RELATIVE_INCLUDE_PATH "inc"
   DEPENDENCIES

CMake/External/External_SFML.cmake

@@ -6,7 +6,7 @@ imstk_add_external_project( SFML
   GIT_REPOSITORY https://github.com/SFML/SFML.git
   GIT_TAG 2.4.2
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DSFML_BUILD_AUDIO:BOOL=ON
     -DSFML_BUILD_GRAPHICS:BOOL=OFF
     -DSFML_BUILD_NETWORK:BOOL=OFF

CMake/External/External_Uncrustify.cmake

@@ -7,7 +7,7 @@ imstk_add_external_project( Uncrustify
   GIT_REPOSITORY https://github.com/uncrustify/uncrustify.git
   GIT_TAG uncrustify-0.64
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
   RELATIVE_INCLUDE_PATH ""
   DEPENDENCIES ""
   #VERBOSE

CMake/External/External_VRPN.cmake

@@ -33,7 +33,7 @@ imstk_add_external_project( VRPN
   GIT_REPOSITORY https://github.com/sjh26/vrpn
   GIT_TAG 6721b5ea8972cf6bcbaccdd2d32479dd77b74b53
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DBUILD_TESTING:BOOL=OFF
     -DVRPN_SUBPROJECT_BUILD:BOOL=ON
     -DVRPN_BUILD_CLIENTS:BOOL=OFF

CMake/External/External_VegaFEM.cmake

@@ -11,7 +11,7 @@ imstk_add_external_project( VegaFEM
   GIT_REPOSITORY https://gitlab.kitware.com/iMSTK/VegaFEM-CMake.git
   GIT_TAG 7bc1bda6a873e2cf4486f9ec3fe6b7b90da76941
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
-  CMAKE_ARGS
+  CMAKE_CACHE_ARGS
     -DVegaFEM_ENABLE_PTHREADS_SUPPORT:BOOL=ON
     -DVegaFEM_ENABLE_OpenGL_SUPPORT:BOOL=OFF
     -DVegaFEM_BUILD_MODEL_REDUCTION:BOOL=OFF