fix the build for newer jdk9 builds

Signed-off-by: Lukas Jungmann <lukas.jungmann@oracle.com>

Author: lukasj

demos/customprovider-jdk9/src/main/java/org/glassfish/json/customprovider/TestProvider.java

@@ -64,12 +64,6 @@
  */
 public class TestProvider extends JsonProvider {
 
-    // need to override this here otherwise JsonProvider.provider()
-    // would be called indefinetly leading to StackOverfolwError
-    public static JsonProvider provider() {
-        return new TestProvider();
-    }
-
     @Override
     public JsonGenerator createGenerator(Writer writer) {
         return new TestGenerator(writer);

pom.xml

@@ -169,7 +169,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>2.10.4</version>
+                    <version>3.0.0-M1</version>
                 </plugin>
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
@@ -430,7 +430,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
-                        <version>2.10.4</version>
+                        <version>3.0.0-M1</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>