JSON: Adding ctest

This commit adds node based tests provided by Nico to the ctest
framework already established in UPM.

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

cmake/modules/FindNpm.cmake

@@ -0,0 +1,13 @@
+# Finding and pointing a variable to the npm executable if found
+# Only works on Linux systems as of now
+
+find_program(NPM_EXECUTABLE NAMES npm
+    HINTS
+    /usr
+)
+
+if(NPM_EXECUTABLE)
+    message(STATUS "NPM Executable found at ${NPM_EXECUTABLE}")
+else()
+    message(ERROR "Unable to find NPM installation, please install NPM")
+endif()