core uses maven-stapler-plugin 1.15.. bump these to match.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30564 71c3de6d-444a-0410-be80-ed276b4c234a

pom.xml

@@ -113,7 +113,7 @@ THE SOFTWARE.
           -->
           <groupId>org.kohsuke.stapler</groupId>
           <artifactId>maven-stapler-plugin</artifactId>
-          <version>1.14</version>
+          <version>1.15</version>
           <extensions>true</extensions>
           <dependencies>
             <dependency>

test/pom.xml

@@ -106,7 +106,7 @@ THE SOFTWARE.
       <plugin>
         <groupId>org.kohsuke.stapler</groupId>
         <artifactId>maven-stapler-plugin</artifactId>
-        <version>1.14</version>
+        <version>1.15</version>
         <extensions>true</extensions>
       </plugin>
     </plugins>

ui-samples-plugin/pom.xml

@@ -84,7 +84,7 @@ THE SOFTWARE.
       <plugin>
         <groupId>org.kohsuke.stapler</groupId>
         <artifactId>maven-stapler-plugin</artifactId>
-        <version>1.12</version>
+        <version>1.15</version>
         <extensions>true</extensions>
       </plugin>
       <plugin>