[CI] Add openstacksdk to packages installed with homebrew.

Author: hageboeck

.github/workflows/update-brew-macs.yml

@@ -15,6 +15,12 @@ on:
     paths:
       - '.github/workflow/update-brew-macs.yml'
 
+  pull_request:
+    branches:
+      - 'master'
+    paths:
+      - '.github/workflow/update-brew-macs.yml'
+
 env:
   VENV_DIR: ${{ github.workspace }}/ROOT_CI_VENV
 
@@ -55,7 +61,7 @@ jobs:
       - name: Update brew packages
         run: |
             brew update
-            brew install ca-certificates ccache googletest "${OPENJDK_PACKAGE_BREW}" pyenv "${PYTHON_PACKAGE_BREW}"
+            brew install ca-certificates ccache googletest "${OPENJDK_PACKAGE_BREW}" pyenv "${PYTHON_PACKAGE_BREW} openstacksdk"
             echo "Installing official brew deps: $(brew deps --direct --include-build root)"
             brew install $(brew deps --direct --include-build root)