Change the tox targtes to match naming

The tox targets were previously src and rdo when they should
have been source and binary.

The gate review has been changed to these as well.

Change-Id: Ib09980c77e5859fa28a54953fc1f3f123c1886d7

tox.ini

@@ -42,7 +42,7 @@ commands =
    sudo -g docker testr run ^(test_images).*
    bash -c "if [ -f buildconf.bak ]; then mv buildconf.bak .buildconf; fi"
 
-[testenv:images-centos-rdo]
+[testenv:images-centos-binary]
 whitelist_externals = find
                       bash
                       sudo
@@ -51,7 +51,7 @@ commands =
    bash -c "if [ ! -d .testrepository ]; then testr init; fi"
    sudo -g docker testr run ^(test_build).*
 
-[testenv:images-centos-src]
+[testenv:images-centos-source]
 whitelist_externals = find
                       bash
                       sudo