ci: redo how env variables are set and shared in ci to prevent collisions

scripts/ci/test-docs.sh

@@ -3,11 +3,13 @@
 set -u -e -o pipefail
 
 # Setup environment
-source ${TRAVIS_BUILD_DIR}/scripts/ci-lite/_travis_fold.sh
-source ${TRAVIS_BUILD_DIR}/scripts/ci-lite/env.sh
+readonly thisDir=$(cd $(dirname $0); pwd)
+source ${thisDir}/_travis-fold.sh
 
 
 travisFoldStart "test.docs"
-  cd ${PROJECT_ROOT}/aio
-  $(npm bin)/gulp docs-test
+  (
+    cd ${PROJECT_ROOT}/aio
+    $(npm bin)/gulp docs-test
+  )
 travisFoldEnd "test.docs"