[collector,manager]feature 支持postgresql数据库的监控 (#16)

collector/pom.xml

@@ -91,6 +91,12 @@
             <artifactId>mysql-connector-java</artifactId>
             <version>8.0.27</version>
         </dependency>
+        <!-- postgresql -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.3.3</version>
+        </dependency>
     </dependencies>
 
 </project>