COMP: Disable building tests for external dependencies

Disable building tests for the following external dependencies
- pthread
- vegaFEM
- g3log

a bug is fixed in the phthread repo https://gitlab.kitware.com/iMSTK/libpthread
Hence the change in the tag

CMake/External/External_PThreads.cmake

@@ -4,7 +4,9 @@
 include(imstkAddExternalProject)
 imstk_add_external_project( PThreads
   GIT_REPOSITORY https://gitlab.kitware.com/iMSTK/libpthread.git
-  GIT_TAG 40707ceea7c35b06f7448f61ae62422efe6a7873
+  GIT_TAG 26bdc33be9786a9ffbfcec806c857ea208c37201
+  CMAKE_CACHE_ARGS
+    -DBUILD_TESTING:BOOL=OFF
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
   RELATIVE_INCLUDE_PATH "include"
   DEPENDENCIES ""

CMake/External/External_VegaFEM.cmake

@@ -15,7 +15,7 @@ imstk_add_external_project( VegaFEM
     -DVegaFEM_ENABLE_PTHREADS_SUPPORT:BOOL=ON
     -DVegaFEM_ENABLE_OpenGL_SUPPORT:BOOL=OFF
     -DVegaFEM_BUILD_MODEL_REDUCTION:BOOL=OFF
-    -DVegaFEM_BUILD_UTILITIES:BOOL=ON
+    -DVegaFEM_BUILD_UTILITIES:BOOL=OFF
   DEPENDENCIES ${VegaFEM_DEPENDENCIES}
   RELATIVE_INCLUDE_PATH ""
   #VERBOSE

CMake/External/External_g3log.cmake

@@ -5,6 +5,8 @@ include(imstkAddExternalProject)
 imstk_add_external_project( g3log
   GIT_REPOSITORY https://gitlab.kitware.com/iMSTK/g3log.git
   GIT_TAG 6c1698c4f7db6b9e4246ead38051f9866ea3ac06
+  CMAKE_CACHE_ARGS
+    -DADD_FATAL_EXAMPLE:BOOL=OFF
   INSTALL_COMMAND ${SKIP_STEP_COMMAND}
   RELATIVE_INCLUDE_PATH "src"
   DEPENDENCIES ""