simplify build parameters

releng.wtpbuilder/build.properties

@@ -3,6 +3,11 @@
 # It is only used to drive the build process
 # it must be relative to the build home
 #
+
+# uncomment if its desired to skip unit tests
+# (if not already defined from elsewhere)
+# skipUnitTests=yes
+
 #
 # in 3.2 based builds, this version is no longer appended to
 # pde builder directory name.