COMP: Fix configuration of project against iMSTK install tree

This commit fixes a regression introduced in (COMP: Add relevant vars to
iMSTKConfig to streamline config against a build-tree),

Note that variable for "regular" project are specified. iMSTK specific
variables likes <proj>_ROOT_DIR and <proj>_LIB_DIR are not set because
the location of the corresponding project is automatically inferred by
Find<proj> CMake module provided by iSMTK.

CMakeLists.txt

@@ -536,7 +536,22 @@ install(
   DESTINATION ${${PROJECT_NAME}_INSTALL_CONFIG_DIR}
   )
 # Configure '${PROJECT_NAME}Config.cmake' for an install tree
-set(CONFIG_CODE "")
+set(CONFIG_CODE "####### Expanded from \@CONFIG_CODE\@ #######\n")
+# Note: iMSTK specific variables likes <proj>_ROOT_DIR and <proj>_LIB_DIR
+# are not set because the location of the corresponding project is automatically
+# inferred by Find<proj> CMake module provided by iSMTK.
+set(CONFIG_CODE "${CONFIG_CODE}set(Eigen3_DIR \"${Eigen3_DIR}\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(GTest_DIR \"${GTest_DIR}\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(TBB_DIR \"${TBB_DIR}\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(VegaFEM_DIR \"${VegaFEM_DIR}\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(VTK_DIR \"${VTK_DIR}\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}# Add variables to CACHE to workaround issue related to use of\n")
+set(CONFIG_CODE "${CONFIG_CODE}# mark_as_advanced command in FindOpenVR and described in CMP0102\n")
+set(CONFIG_CODE "${CONFIG_CODE}# See https://cmake.org/cmake/help/latest/policy/CMP0102.html\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(OpenVR_INCLUDE_DIR \"${OpenVR_INCLUDE_DIR}\" CACHE PATH \"\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}set(OpenVR_LIBRARY \"${OpenVR_LIBRARY}\" CACHE FILEPATH \"\")\n")
+set(CONFIG_CODE "${CONFIG_CODE}##################################################")
+
 set(install_config ${PROJECT_BINARY_DIR}/CMakeFiles/${PROJECT_NAME}Config.cmake)
 configure_package_config_file(
   CMake/${PROJECT_NAME}Config.cmake.in