Update spotbugs

Author: poorna2152

findbugs-exclude.xml

@@ -18,22 +18,6 @@
   -->
 
 <FindBugsFilter>
-    <Match>
-        <Class name="io.siddhi.extension.io.kafka.source.KafkaSource"/>
-        <Bug pattern="IMPROPER_UNICODE"/>
-    </Match>
-    <Match>
-        <Class name="io.siddhi.extension.io.kafka.source.KafkaReplayResponseSource"/>
-        <Bug pattern="IMPROPER_UNICODE"/>
-    </Match>
-    <Match>
-        <Class name="io.siddhi.extension.io.kafka.source.KafkaConsumerThread"/>
-        <Bug pattern="IMPROPER_UNICODE"/>
-    </Match>
-    <Match>
-        <Class name="io.siddhi.extension.io.kafka.sink.KafkaSink"/>
-        <Bug pattern="IMPROPER_UNICODE"/>
-    </Match>
     <Match>
         <Class name="io.siddhi.extension.io.kafka.multidc.source.SourceSynchronizer"/>
         <Bug pattern="DLS_DEAD_LOCAL_STORE"/>
@@ -42,4 +26,8 @@
         <Package name="~io\.siddhi\.extension\.io\.kafka.*"/>
         <Bug pattern="SIC_INNER_SHOULD_BE_STATIC"/>
     </Match>
+    <Match>
+        <Class name="io.siddhi.extension.io.kafka.source.KafkaSource"/>
+        <Bug pattern="RCN_REDUNDANT_COMPARISON_OF_NULL_AND_NONNULL_VALUE"/>
+    </Match>
 </FindBugsFilter>

pom.xml

@@ -332,12 +332,26 @@
                     <autoVersionSubmodules>true</autoVersionSubmodules>
                 </configuration>
             </plugin>
-            <plugin>
+            <plugin><!-- Overridden from parent pom to exclude generated sources -->
                 <groupId>com.github.spotbugs</groupId>
                 <artifactId>spotbugs-maven-plugin</artifactId>
-                <configuration>
+                <configuration combine.self="override">
+                    <effort>Max</effort>
+                    <threshold>Low</threshold>
+                    <xmlOutput>true</xmlOutput>
+                    <spotbugsXmlOutputDirectory>${project.build.directory}/findbugs</spotbugsXmlOutputDirectory>
                     <excludeFilterFile>${maven.findbugsplugin.version.exclude}</excludeFilterFile>
+                    <!--Exclude generated sources-->
                 </configuration>
+                <executions>
+                    <execution>
+                        <id>analyze-compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
         </plugins>