add fallback and bldr channel env vars to envrc and set back to dev w…

…hen doing builds (#5741)

Signed-off-by: Rick Marry <rmarry@chef.io>

.envrc

@@ -39,3 +39,6 @@ export HAB_STUDIO_SECRET_AWS_SECRET_ACCESS_KEY="${AWS_SECRET_ACCESS_KEY}"
 export HAB_STUDIO_SECRET_AZURE_CLIENT_ID="${AZURE_CLIENT_ID}"
 export HAB_STUDIO_SECRET_AZURE_CLIENT_SECRET="${AZURE_CLIENT_SECRET}"
 export HAB_STUDIO_SECRET_AZURE_TENANT_ID="${AZURE_TENANT_ID}"
+
+export HAB_STUDIO_SECRET_HAB_BLDR_CHANNEL=stable2021-q2
+export HAB_STUDIO_SECRET_HAB_FALLBACK_CHANNEL=stable2021-q2

.studio/common

@@ -200,7 +200,7 @@ document "build" <<EOF
 EOF
 function build() {
   local hab_build
-
+  HAB_BLDR_CHANNEL=dev
   # Support for hab v.0.63.0
   if [ -f /bin/build ]; then
     hab_build=/bin/build