ozg-7493 use send failure message function

Jenkinsfile

@@ -213,9 +213,7 @@ pipeline {
     post {
         failure {
             script {
-                if (isMainBranch() || isReleaseBranch()) {
-                    sendFailureMessage()
-                }
+                sendMatrixMessage.sendFailureMessage("Operator: Build Failed. Stage: ${FAILED_STAGE} Build-ID: <a href='${JENKINS_URL}'>${env.BUILD_NUMBER}</a>")
             }
         }
     }
@@ -409,15 +407,4 @@ Boolean matchRegexVersion(List versions, String regex) {
     }
 
     return true
-}
-
-Void sendFailureMessage() {
-    def message = "Operator: Build Failed. Stage: ${FAILED_STAGE} Build-ID: <a href='${JENKINS_URL}'>${env.BUILD_NUMBER}</a>"
-
-    if (isMainBranch()){
-        sendMatrixMessage.sendMessageToMasterRoom(message)
-    }
-    else {
-        sendMatrixMessage.sendMessageToReleaseRoom(message)
-    }
 }
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