Update japicmp-maven-plugin to 0.15.3

Change-Id: I3b1b295e7f97182a5541b1912e0acbfffb981d71

org.eclipse.jgit.http.server/pom.xml

@@ -126,6 +126,7 @@
                       <groupId>${project.groupId}</groupId>
                       <artifactId>${project.artifactId}</artifactId>
                       <version>${jgit-last-release-version}</version>
+                      <type>jar</type>
                   </dependency>
               </oldVersion>
               <newVersion>
@@ -143,7 +144,7 @@
                   <breakBuildOnBinaryIncompatibleModifications>false</breakBuildOnBinaryIncompatibleModifications>
                   <onlyBinaryIncompatible>false</onlyBinaryIncompatible>
                   <includeSynthetic>false</includeSynthetic>
-                  <ignoreMissingClasses>false</ignoreMissingClasses>
+                  <ignoreMissingClasses>true</ignoreMissingClasses>
                   <skipPomModules>true</skipPomModules>
               </parameter>
               <skip>false</skip>

pom.xml

@@ -163,7 +163,7 @@
     <osgi-core-version>4.3.1</osgi-core-version>
     <servlet-api-version>3.1.0</servlet-api-version>
     <jetty-version>9.4.36.v20210114</jetty-version>
-    <japicmp-version>0.14.4</japicmp-version>
+    <japicmp-version>0.15.3</japicmp-version>
     <httpclient-version>4.5.13</httpclient-version>
     <httpcore-version>4.4.14</httpcore-version>
     <slf4j-version>1.7.30</slf4j-version>