Change scope of postgres-testing to test

This removes postgres-testing from the runtime jar.

pom.xml

@@ -186,6 +186,7 @@
       <groupId>org.folio</groupId>
       <artifactId>postgres-testing</artifactId>
       <version>${raml-module-builder.version}</version>
+      <scope>test</scope>
     </dependency>
   </dependencies>