Change get-pip url

The path for get-pip.py script in version 3.2 has been changed
with this commit [1].

[1] 2360f025eb

Change-Id: I3986238b0a65fb652b30a8a47448a1d02212166e

doc/source/developer/extensions/extending_yaql.rst

@@ -121,7 +121,7 @@ For more information about YAQL, read the `official YAQL documentation <http://y
 
 .. code-block:: bash
 
-    $ curl https://bootstrap.pypa.io/3.2/get-pip.py | python
+    $ curl https://bootstrap.pypa.io/pip/3.2/get-pip.py | python
     $ pip install --upgrade setuptools
     $ cd -
 

tools/docker/Dockerfile

@@ -22,7 +22,7 @@ RUN apt-get -qq update && \
       gcc \
       libuv1 \
       libuv1-dev && \
-      curl -f -o /tmp/get-pip.py https://bootstrap.pypa.io/3.2/get-pip.py && \
+      curl -f -o /tmp/get-pip.py https://bootstrap.pypa.io/pip/3.2/get-pip.py && \
       python /tmp/get-pip.py && rm /tmp/get-pip.py && \
       pip install --upgrade pip