Update docker-py commit

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
diff --git a/Dockerfile b/Dockerfile
index bf86bdb..25da313 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -133,7 +133,7 @@
 	&& rm -rf "$GOPATH"
 
 # Get the "docker-py" source so we can run their integration tests
-ENV DOCKER_PY_COMMIT a962578e515185cf06506050b2200c0b81aa84ef
+ENV DOCKER_PY_COMMIT ca7a6132a418c32df6bb11ba9b2a8b9b2727227a
 # To run integration tests docker-pycreds is required.
 RUN git clone https://github.com/docker/docker-py.git /docker-py \
 	&& cd /docker-py \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 4a4c635..97dff46 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -105,7 +105,7 @@
 	&& rm -rf "$GOPATH"
 
 # Get the "docker-py" source so we can run their integration tests
-ENV DOCKER_PY_COMMIT a962578e515185cf06506050b2200c0b81aa84ef
+ENV DOCKER_PY_COMMIT ca7a6132a418c32df6bb11ba9b2a8b9b2727227a
 # To run integration tests docker-pycreds is required.
 RUN git clone https://github.com/docker/docker-py.git /docker-py \
 	&& cd /docker-py \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index e64bfd7..30ddf8c 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -103,7 +103,7 @@
 	&& rm -rf "$GOPATH"
 
 # Get the "docker-py" source so we can run their integration tests
-ENV DOCKER_PY_COMMIT a962578e515185cf06506050b2200c0b81aa84ef
+ENV DOCKER_PY_COMMIT ca7a6132a418c32df6bb11ba9b2a8b9b2727227a
 # To run integration tests docker-pycreds is required.
 RUN git clone https://github.com/docker/docker-py.git /docker-py \
 	&& cd /docker-py \
diff --git a/Dockerfile.ppc64le b/Dockerfile.ppc64le
index c95b68b..709a6e6 100644
--- a/Dockerfile.ppc64le
+++ b/Dockerfile.ppc64le
@@ -101,7 +101,7 @@
 	&& rm -rf "$GOPATH"
 
 # Get the "docker-py" source so we can run their integration tests
-ENV DOCKER_PY_COMMIT a962578e515185cf06506050b2200c0b81aa84ef
+ENV DOCKER_PY_COMMIT ca7a6132a418c32df6bb11ba9b2a8b9b2727227a
 # To run integration tests docker-pycreds is required.
 RUN git clone https://github.com/docker/docker-py.git /docker-py \
 	&& cd /docker-py \
diff --git a/Dockerfile.s390x b/Dockerfile.s390x
index b438a5d..752d052 100644
--- a/Dockerfile.s390x
+++ b/Dockerfile.s390x
@@ -95,7 +95,7 @@
 	&& rm -rf "$GOPATH"
 
 # Get the "docker-py" source so we can run their integration tests
-ENV DOCKER_PY_COMMIT a962578e515185cf06506050b2200c0b81aa84ef
+ENV DOCKER_PY_COMMIT ca7a6132a418c32df6bb11ba9b2a8b9b2727227a
 # To run integration tests docker-pycreds is required.
 RUN git clone https://github.com/docker/docker-py.git /docker-py \
 	&& cd /docker-py \