Rename basebuild to builder

Rename nodes from "basebuild" to "builder" in preparation
for updating to common-packer.

Change-Id: I6ff64e3ee5c856391430296aded45d84c46de171
Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/doc/doc.yaml b/jjb/doc/doc.yaml
index 21111d0..03a9e18 100644
--- a/jjb/doc/doc.yaml
+++ b/jjb/doc/doc.yaml
@@ -5,7 +5,7 @@
     jobs:
       - gerrit-maven-clm
       - '{project-name}-{stream}-verify-rtd':
-          build-node: centos7-basebuild-4c-4g
+          build-node: centos7-builder-4c-4g
       - '{project-name}-{stream}-merge-rtd'
 
     project: 'doc'