[travis] 2.2.1 breaks travis, trying 2.1.5.

Author: truthbk

.travis.yml

@@ -33,7 +33,7 @@ env:
 before_install:
   - echo "OVERRIDING TRAVIS STEPS"
   - rvm get stable --auto-dotfiles
-  - rvm install 2.2.1
+  - rvm install 2.1.5
 install: echo "OVERRIDING TRAVIS STEPS"
 before_script: echo "OVERRIDING TRAVIS STEPS"