GUACAMOLE-2139: Inherit guacamole-client version via "revision" property (supported since Maven 3.5.0).

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/pom.xml

@@ -32,7 +32,7 @@
     <parent>
         <groupId>org.apache.guacamole</groupId>
         <artifactId>guacamole-auth-jdbc</artifactId>
-        <version>1.6.1</version>
+        <version>${revision}</version>
         <relativePath>../../</relativePath>
     </parent>
 
@@ -50,7 +50,6 @@
         <dependency>
             <groupId>org.apache.guacamole</groupId>
             <artifactId>guacamole-ext</artifactId>
-            <scope>provided</scope>
         </dependency>
 
         <!-- MyBatis -->