oae-email tests broken

Ever since d150fa8871ce596bfb1d9bcd6cddae8ddf87b843 was merged `grunt test-module:oae-email` fails:

    1) Emails Email configuration verify noreply from header:
         Uncaught AssertionError: false == true
          at /home/stuart/src/hilary/node_modules/oae-email/tests/test-email.js:411:36
          at /home/stuart/src/hilary/node_modules/oae-email/lib/test/util.js:105:32
          at allDone (/home/stuart/src/hilary/node_modules/oae-activity/lib/internal/email.js:192:20)
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:119:16
          at _collectBuckets (/home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:138:16)
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:149:16
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:215:28
          at /home/stuart/src/hilary/node_modules/oae-util/lib/locking.js:94:20
          at b (domain.js:183:18)
          at try_callback (/home/stuart/src/hilary/node_modules/redis/index.js:592:9)

    2) Emails Spam Score verify emails have a trustworthy message id:
         Uncaught AssertionError: false == true
          at /home/stuart/src/hilary/node_modules/oae-email/tests/test-email.js:466:32
          at /home/stuart/src/hilary/node_modules/oae-email/lib/test/util.js:105:32
          at allDone (/home/stuart/src/hilary/node_modules/oae-activity/lib/internal/email.js:192:20)
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:119:16
          at _collectBuckets (/home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:138:16)
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:149:16
          at /home/stuart/src/hilary/node_modules/oae-activity/lib/internal/buckets.js:215:28
          at /home/stuart/src/hilary/node_modules/oae-util/lib/locking.js:94:20
          at b (domain.js:183:18)
          at try_callback (/home/stuart/src/hilary/node_modules/redis/index.js:592:9)

Note that these do not fail when running the full test suite.