chore(jenkins): fix node version chooser in build scripts

The `set-node-version.sh` script was being run in its own shell and so
was not actually changing the current version of node.

Author: petebacondarwin

scripts/jenkins/build.sh

@@ -4,11 +4,11 @@ echo "#################################"
 echo "####  Jenkins Build  ############"
 echo "#################################"
 
+source scripts/jenkins/set-node-version.sh
+
 # Enable tracing and exit on first failure
 set -xe
 
-scripts/jenkins/set-node-version.sh
-
 # This is the default set of browsers to use on the CI server unless overridden via env variable
 if [[ -z "$BROWSERS" ]]
 then

scripts/jenkins/release.sh

@@ -35,7 +35,7 @@ function init {
 }
 
 function build {
-  ./set-node-version.sh
+  source ./set-node-version.sh
   cd ../..
 
   npm install -g grunt-cli