[collector]add snmp dependency

collector/pom.xml

@@ -103,6 +103,12 @@
             <artifactId>sshd-core</artifactId>
             <version>2.8.0</version>
         </dependency>
+        <!-- snmp mib -->
+        <dependency>
+            <groupId>org.snmp4j</groupId>
+            <artifactId>snmp4j</artifactId>
+            <version>2.8.9</version>
+        </dependency>
     </dependencies>
 
 </project>