fixed some compiler warnings

quartz-manager-parent/pom.xml

@@ -181,6 +181,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
+        <version>3.4.1</version>
         <executions>
           <execution>
             <id>attach-javadocs</id>
@@ -188,6 +189,7 @@
               <goal>jar</goal>
             </goals>
             <configuration>
+              <detectJavaApiLink>false</detectJavaApiLink>
               <doclint>none</doclint>
             </configuration>
           </execution>