Address javadoc build issues

maven-javadoc-plugin started to fail when using java 11 compiler.  Some
issues are addressed in latest version of plugin (3.2.0), but it appears
some issues remain.  To address this, we use the latest plugin version
and configure maven to continue if javadoc errors occur. Note: this issue
is currently causing verify builds to fail - thus, this is a blocking
issue.

Change-Id: I0a9882b4b93ea18b29e2d53d269cf70dda77a4d1
Issue-ID: CCSDK-2728
Signed-off-by: Dan Timoney <dtimoney@att.com>
diff --git a/odlparent/mdsal-it-parent/pom.xml b/odlparent/mdsal-it-parent/pom.xml
index 24ab953..e23a473 100644
--- a/odlparent/mdsal-it-parent/pom.xml
+++ b/odlparent/mdsal-it-parent/pom.xml
@@ -564,6 +564,14 @@
                         <version>7.1.1</version>
                     </configuration>
                 </plugin>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>3.2.0</version>
+                    <configuration>
+                        <failOnError>false</failOnError>
+                    </configuration>
+                </plugin>
             </plugins>
         </pluginManagement>
         <plugins>