Skip ElasticSearch install on Travis for unit tests

Author: schmengler

.travis.yml

@@ -39,10 +39,13 @@ cache:
   directories:
     - $HOME/.composer/cache
 before_install:
-  - curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.2-amd64.deb
-  - sudo dpkg -i --force-confnew elasticsearch-7.6.2-amd64.deb
-  - sudo chown -R elasticsearch:elasticsearch /etc/default/elasticsearch
-  - sudo service elasticsearch restart
+  - |
+    [[ $TEST_SUITE == "unit" ]] || (
+    curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.2-amd64.deb
+    sudo dpkg -i --force-confnew elasticsearch-7.6.2-amd64.deb
+    sudo chown -R elasticsearch:elasticsearch /etc/default/elasticsearch
+    sudo service elasticsearch restart
+    )
 before_script:
   - |
     sleep 10