benchmarks: use org.eclipse.jgit-parent as parent pom

Change-Id: I2248c12072adccaf2ba525da5dec4fb5b35ca383

org.eclipse.jgit.benchmarks/.classpath

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="src" output="target/classes" path="src">
+	<classpathentry including="**/*.java" kind="src" output="target/classes" path="src">
 		<attributes>
 			<attribute name="optional" value="true"/>
 			<attribute name="maven.pomderived" value="true"/>
@@ -19,18 +19,7 @@
 	<classpathentry kind="src" path=".apt_generated">
 		<attributes>
 			<attribute name="optional" value="true"/>
-			<attribute name="maven.pomderived" value="true"/>
-			<attribute name="ignore_optional_problems" value="true"/>
-			<attribute name="m2e-apt" value="true"/>
-		</attributes>
-	</classpathentry>
-	<classpathentry kind="src" output="target/test-classes" path="target/generated-test-sources/test-annotations">
-		<attributes>
-			<attribute name="optional" value="true"/>
-			<attribute name="maven.pomderived" value="true"/>
-			<attribute name="ignore_optional_problems" value="true"/>
-			<attribute name="m2e-apt" value="true"/>
 		</attributes>
 	</classpathentry>
 	<classpathentry kind="output" path="target/classes"/>
-</classpath>
+</classpath>

org.eclipse.jgit.benchmarks/.settings/org.eclipse.jdt.core.prefs

@@ -42,7 +42,7 @@ org.eclipse.jdt.core.compiler.problem.includeNullInfoFromAsserts=enabled
 org.eclipse.jdt.core.compiler.problem.incompatibleNonInheritedInterfaceMethod=warning
 org.eclipse.jdt.core.compiler.problem.incompleteEnumSwitch=warning
 org.eclipse.jdt.core.compiler.problem.indirectStaticAccess=warning
-org.eclipse.jdt.core.compiler.problem.invalidJavadoc=error
+org.eclipse.jdt.core.compiler.problem.invalidJavadoc=warning
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTags=enabled
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTagsDeprecatedRef=enabled
 org.eclipse.jdt.core.compiler.problem.invalidJavadocTagsNotVisibleRef=enabled
@@ -57,7 +57,7 @@ org.eclipse.jdt.core.compiler.problem.missingJavadocComments=ignore
 org.eclipse.jdt.core.compiler.problem.missingJavadocCommentsOverriding=disabled
 org.eclipse.jdt.core.compiler.problem.missingJavadocCommentsVisibility=protected
 org.eclipse.jdt.core.compiler.problem.missingJavadocTagDescription=return_tag
-org.eclipse.jdt.core.compiler.problem.missingJavadocTags=error
+org.eclipse.jdt.core.compiler.problem.missingJavadocTags=warning
 org.eclipse.jdt.core.compiler.problem.missingJavadocTagsMethodTypeParameters=disabled
 org.eclipse.jdt.core.compiler.problem.missingJavadocTagsOverriding=disabled
 org.eclipse.jdt.core.compiler.problem.missingJavadocTagsVisibility=private

org.eclipse.jgit.benchmarks/pom.xml

@@ -13,8 +13,12 @@
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
 
-  <groupId>org.eclipse.jgit</groupId>
-  <version>6.8.0-SNAPSHOT</version>
+  <parent>
+    <groupId>org.eclipse.jgit</groupId>
+    <artifactId>org.eclipse.jgit-parent</artifactId>
+    <version>6.8.0-SNAPSHOT</version>
+  </parent>
+
   <artifactId>org.eclipse.jgit.benchmarks</artifactId>
   <packaging>jar</packaging>
 
@@ -143,6 +147,30 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <configuration>
+          <!-- We check javadoc when compiling with ecj (option -Pecj) and configurations
+          set in .settings/org.eclipse.jdt.core.prefs. This allows more fine grained
+          configuration and fails the build on missing javadoc for protected and
+          public but not for private classes, methods and fields. We don't want
+          to check javadoc on tests. We can reconsider to configure this on javadoc
+          when it starts supporting access specifiers so that we can set
+          -Xdoclint:all,-missing/private -->
+          <additionalJOption>-Xdoclint:none</additionalJOption>
+          <encoding>${project.build.sourceEncoding}</encoding>
+          <quiet>true</quiet>
+          <failOnWarnings>false</failOnWarnings>
+        </configuration>
+        <executions>
+          <execution>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
     <pluginManagement>
       <plugins>