(maint) Allow PUPPET_FORGE_USERNAME to be passed into the running docker container

Previously, when running docker/bin/install.sh, you couldn't pass `license-id`
as it was hardcoded to `forge-key`.

Author: joshcooper

docker/bin/helpers/run-install.sh

@@ -27,6 +27,7 @@ fi
 export PT__installdir=../
 export PT_version=${to_version}
 export PT_collection=${to_collection}
+export PT_username=${PUPPET_FORGE_USERNAME}
 export PT_password=${PUPPET_FORGE_TOKEN}
 chmod u+x tasks/install_shell.sh
 tasks/install_shell.sh

docker/bin/install.sh

@@ -72,6 +72,6 @@ do
     # Add "--progress plain" for complete build output
     docker build --rm -f "${dockerfile}" . -t pa-dev:$platform.install \
            --build-arg BASE_IMAGE="${base_image}"
-    docker run -e PUPPET_FORGE_TOKEN --rm -ti pa-dev:$platform.install "${version}" "${collection}"
+    docker run -e PUPPET_FORGE_USERNAME -e PUPPET_FORGE_TOKEN --rm -ti pa-dev:$platform.install "${version}" "${collection}"
 done
 echo Complete