set mvn runtime scope for spi modules

Author: rashtao

driver/pom.xml

@@ -138,12 +138,12 @@
         <dependency>
             <groupId>com.arangodb</groupId>
             <artifactId>jackson-serde-vpack</artifactId>
-            <optional>true</optional>
+            <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>com.arangodb</groupId>
             <artifactId>vst-protocol</artifactId>
-            <optional>true</optional>
+            <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>org.reflections</groupId>