Add a travis job to test the new resolver known failures

.travis.yml

@@ -61,6 +61,9 @@ jobs:
     - env:
       - GROUP=2
       - NEW_RESOLVER=1
+    - env:
+      - GROUP=3
+      - NEW_RESOLVER=1
 
   fast_finish: true
   allow_failures:

tools/travis/run.sh

@@ -55,6 +55,10 @@ elif [[ "$GROUP" == "2" ]]; then
     # Separate Job for running integration tests for 'pip install'
     tox -- -m integration -n auto --duration=5 -k "test_install" \
         --use-venv $RESOLVER_SWITCH
+elif [[ "$GROUP" == "3" ]]; then
+    # Separate Job for tests that fail with the new resolver
+    tox -- -m fails_on_new_resolver -n auto --duration=5 \
+        --use-venv $RESOLVER_SWITCH --new-resolver-runtests
 else
     # Non-Testing Jobs should run once
     tox