Update build.yml for the case there are no Mule EE credentials

Author: drpy

.github/workflows/build.yml

@@ -20,13 +20,23 @@ jobs:
         cache: maven
 
     - name: maven-settings-action
+      if: ${{ secrets.MULE_REPO_USER != '' && secrets.MULE_REPO_PASSWORD != '' }}
       uses: s4u/maven-settings-action@894661b3ddae382f1ae8edbeab60987e08cf0788 # commit hash references to v4.0.0
       with:
         servers: '[{"id": "mulesoft-ee-releases", "username": "${env.MULE_REPO_USER}", "password": "${env.MULE_REPO_PASSWORD}"}]'
         repositories: '[{"id": "mulesoft-ee-releases", "name": "MuleSoft EE Releases", "url": "https://repository.mulesoft.org/nexus-ee/content/repositories/releases-ee/"}]'
 
     - name: Build and test
+      if: ${{ secrets.MULE_REPO_USER != '' && secrets.MULE_REPO_PASSWORD != '' }}
       env:
         MULE_REPO_USER: ${{ secrets.MULE_REPO_USER }}
         MULE_REPO_PASSWORD: ${{ secrets.MULE_REPO_PASSWORD }}
-      run: mvn -B verify
+      run: mvn -B clean verify
+
+
+    - name: Build only because of missing Mule EE secrets
+      if: ${{ secrets.MULE_REPO_USER == '' || secrets.MULE_REPO_PASSWORD == '' }}
+      env:
+        MULE_REPO_USER: ${{ secrets.MULE_REPO_USER }}
+        MULE_REPO_PASSWORD: ${{ secrets.MULE_REPO_PASSWORD }}
+      run: mvn -B clean install -DskipTests