Update Jenkinsfile to use main

Author: rjeberhard

Jenkinsfile

@@ -9,8 +9,8 @@ pipeline {
     }
 
     triggers {
-        // timer trigger for "nightly build" on master branch
-        cron( env.BRANCH_NAME.equals('master') ? 'H H(0-3) * * 1-5' : '')
+        // timer trigger for "nightly build" on main branch
+        cron( env.BRANCH_NAME.equals('main') ? 'H H(0-3) * * 1-5' : '')
     }
 
     environment {
@@ -50,7 +50,7 @@ pipeline {
         stage ('SystemTest Gate') {
             when {
                 allOf {
-                    changeRequest target: 'master'
+                    changeRequest target: 'main'
                     not { changelog '\\[skip-ci\\].*' }
                     not { changelog '\\[full-mats\\].*' }
                 }
@@ -103,12 +103,12 @@ pipeline {
             when {
                 allOf {
                     triggeredBy 'TimerTrigger'
-                    branch "master"
+                    branch "main"
                 }
             }
             steps {
                 sh '''
-                    oci os object put --namespace=weblogick8s --bucket-name=wko-system-test-files --config-file=/dev/null --auth=instance_principal --force --file=installer/target/imagetool.zip --name=imagetool-master.zip
+                    oci os object put --namespace=weblogick8s --bucket-name=wko-system-test-files --config-file=/dev/null --auth=instance_principal --force --file=installer/target/imagetool.zip --name=imagetool-main.zip
                 '''
             }
         }