tweak test to work on java 8

Author: puredanger

Diff for: src/test/clojure/clojure/tools/build/tasks/test_process.clj

@@ -17,7 +17,7 @@
   (is (string? (api/git-process {:git-args ["log"]}))))
 
 (deftest test-capture
-  (is (string? (:out (api/process {:command-args ["java" "--version"]
+  (is (string? (:out (api/process {:command-args ["mvn" "-v"]
                                    :out :capture}))))
   (is (string? (:err (api/process {:command-args ["java" "-version"]
                                    :err :capture})))))