Updates swift docs to use correct release PPA.

Changes swift doc references from defunct ppa repo swift-core/ppa to
new swift-core/release repo.  Fixes lp bug 905608.

Change-Id: I58d85b22d8dbcff43b03eb256ad39e03dd208bfc

doc/source/debian_package_guide.rst

@@ -56,7 +56,7 @@ Instructions for Building Debian Packages for Swift
 * Add swift-core/ppa repository and install prerequisites. As root::
 
        apt-get install python-software-properties
-       add-apt-repository ppa:swift-core/ppa
+       add-apt-repository ppa:swift-core/release
        apt-get update
        apt-get install curl gcc bzr python-configobj python-coverage python-dev python-nose python-setuptools python-simplejson python-xattr python-webob python-eventlet python-greenlet debhelper python-sphinx python-all python-openssl python-pastedeploy python-netifaces bzr-builddeb
 
@@ -100,7 +100,7 @@ Instructions for Deploying Debian Packages for Swift
 
   #. Setup the swift ppa::
  
-       add-apt-repository ppa:swift-core/ppa
+       add-apt-repository ppa:swift-core/release
        apt-get update
 
   #. Install dependencies::

doc/source/development_saio.rst

@@ -26,7 +26,7 @@ Installing dependencies and the core code
 * As root on guest (you'll have to log in as you, then `sudo su -`):
 
   #. `apt-get install python-software-properties`
-  #. `add-apt-repository ppa:swift-core/ppa`
+  #. `add-apt-repository ppa:swift-core/release`
   #. `apt-get update`
   #. `apt-get install curl gcc git-core memcached python-configobj
      python-coverage python-dev python-nose python-setuptools python-simplejson

doc/source/getting_started.rst

@@ -35,7 +35,7 @@ A source tarball for the latest release of Swift is available on the `launchpad
 
 Prebuilt packages for Ubuntu are available starting with Natty, or from PPAs for earlier releases.
 
-* `Swift Latest Release PPA <https://launchpad.net/~swift-core/+archive/ppa>`_
+* `Swift Latest Release PPA <https://launchpad.net/~swift-core/+archive/release>`_
 * `Swift Current Trunk PPA <https://launchpad.net/~swift-core/+archive/trunk>`_
 
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