Include queuable extra in docker image, and use more recent datalake

Previously we were pinned to an older version

Author: oldpatricka

Dockerfile

@@ -8,6 +8,7 @@ ENV	LC_ALL C.UTF-8
 # TODO: keep requirements in one place
 RUN pip install \
     blinker>=1.4 \
+    boto>=2.49 \
     boto3>=1.1.3 \
     click>=5.1 \
     Flask>=0.10.1 \
@@ -29,7 +30,7 @@ RUN pip install \
     pyinotify>=0.9.4, \
     raven>=5.0.0 \
     'tox>4,<5' \
-    'datalake<2'
+    'datalake[queuable]>2'
 
 RUN mkdir -p /opt/
 COPY . /opt/