Pin moto version for tox environments. (#149)

Author: TimPansino

tox.ini

@@ -188,10 +188,10 @@ deps =
     datastore_solrpy-solrpy01: solrpy<2.0
     datastore_umemcache: umemcache<1.7
     external_boto3-boto01: boto3<2.0
-    external_boto3-boto01: moto
+    external_boto3-boto01: moto<2.0
     external_boto3-py27: rsa<4.7.1
     external_botocore: botocore
-    external_botocore: moto[awslambda,ec2,iam]
+    external_botocore: moto[awslambda,ec2,iam]<2.0
     external_botocore-py27: rsa<4.7.1
     external_feedparser-feedparser05: feedparser<6
     external_feedparser-feedparser06: feedparser<7