Use jenkins.baseline to reduce bom update mistakes (#372)

Author: strangelookingnerd

pom.xml

@@ -26,7 +26,9 @@
     <properties>
         <revision>5.0.1</revision>
         <changelist>-SNAPSHOT</changelist>
-        <jenkins.version>2.414.3</jenkins.version>
+        <!-- https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/ -->
+        <jenkins.baseline>2.414</jenkins.baseline>
+        <jenkins.version>${jenkins.baseline}.3</jenkins.version>
 
         <gitHubRepo>jenkinsci/office-365-connector-plugin</gitHubRepo>
 
@@ -37,7 +39,7 @@
         <dependencies>
             <dependency>
                 <groupId>io.jenkins.tools.bom</groupId>
-                <artifactId>bom-2.414.x</artifactId>
+                <artifactId>bom-${jenkins.baseline}.x</artifactId>
                 <!-- Latest version based on
                      https://repo.jenkins-ci.org/artifactory/public/io/jenkins/tools/bom/
 				     https://www.jenkins.io/doc/developer/plugin-development/dependency-management/#jenkins-plugin-bom