MB-57305 Merge branch 'mad-hatter' into cheshire-cat

* mad-hatter:
  MB-57305 Switch from 'ubuntu-18.04&&master' to 'linux&&${branch}'

Change-Id: I49d392cd7ea36d8bfc6699a2ae2f1374d633604f

Author: jamesl33

Jenkinsfile

@@ -12,7 +12,7 @@
  import jenkins.model.CauseOfInterruption.UserInterruption
 
 pipeline {
-    agent { label "ubuntu-18.04&&master" }
+    agent { label "linux&&cheshire-cat" }
 
     environment {
         PROJECTPATH="${WORKSPACE}/couchbase-cli"