adding stages to test the right go versions

Signed-off-by: Mike Brown <brownwm@us.ibm.com>

.travis.yml

@@ -1,6 +1,4 @@
 language: go
-go:
-    - 1.8
 
 sudo: required
 
@@ -29,12 +27,28 @@ jobs:
         - make .gitvalidation
         - make verify
         - make binaries
+      go: 1.8.x
+    - stage: Build
+      script:
+        - make install.tools
+        - make .gitvalidation
+        - make verify
+        - make binaries
+      go: tip
     - stage: Test
       script:
         - make install.deps
         - make test
         - make binaries
         - make test-cri
+      go: 1.8.x
+    - stage: Test
+      script:
+        - make install.deps
+        - make test
+        - make binaries
+        - make test-cri
+      go: tip
 
 after_script:
     # Abuse travis to preserve the log.