Spec: also unset JAVACMD

Author: olleolleolle

spec/spec_helper.rb

@@ -70,6 +70,7 @@ def with_environment(pairs = {})
   config.before(:all) do
     JRubyLauncherHelper.check_executable_built
     # clear environment for better control
+    ENV.delete("JAVACMD")
     ENV.delete("JAVA_HOME")
     ENV.delete("JRUBY_HOME")
     ENV.delete("JAVA_OPTS")