travis php 5.6 passing correctly now.

.travis.yml

@@ -1,6 +1,6 @@
 language: php
 
-sudo: required
+sudo: false
 
 cache:
   directories:
@@ -10,10 +10,6 @@ php:
  - 5.6
  - 7.0
 
-matrix:
-  allow_failures:
-  - php: 5.6 # travis seems to fail on adding activity - doesn't fail when running behat locally.
-
 env:
  matrix:
   - DB=pgsql MOODLE_BRANCH=MOODLE_32_STABLE