GUACAMOLE-1809: Replace library used for IP address matching

Newer versions of Spring Security lack support of Java 8.

extensions/guacamole-auth-json/pom.xml

@@ -73,11 +73,18 @@
             <scope>provided</scope>
         </dependency>
 
-        <!-- Spring security library (required for IP address matching) -->
+        <!-- IPAddress (required for IP address matching) -->
         <dependency>
-            <groupId>org.springframework.security</groupId>
-            <artifactId>spring-security-web</artifactId>
-            <version>5.8.3</version>
+            <groupId>com.github.seancfoley</groupId>
+            <artifactId>ipaddress</artifactId>
+            <version>5.4.0</version>
+        </dependency>
+
+        <!-- JUnit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
         </dependency>
 
     </dependencies>