Fix the xml issue for the is-abstract field

New XML property was added before the closing of
the previous xml property which broke schema service
Also updating the unit tests so when this happens again
the unit tests should fail so this issue shouldn't arise again

Issue-ID: AAI-2593

Change-Id: I949c02aa8325c4235198c284e3ceb7538e389e11
Signed-off-by: Harish Venkata Kajur <vk250x@att.com>
diff --git a/aai-schema-service/pom.xml b/aai-schema-service/pom.xml
index 21f414e..9b7de84 100644
--- a/aai-schema-service/pom.xml
+++ b/aai-schema-service/pom.xml
@@ -81,8 +81,8 @@
         <schema.version.app.root.start>v11</schema.version.app.root.start>
         <schema.version.namespace.change.start>v12</schema.version.namespace.change.start>
         <schema.version.edge.label.start>v12</schema.version.edge.label.start>
-        <schema.version.api.default>v16</schema.version.api.default>
-        <schema.version.list>v10,v11,v12,v13,v14,v15,v16</schema.version.list>
+        <schema.version.api.default>v19</schema.version.api.default>
+        <schema.version.list>v10,v11,v12,v13,v14,v15,v16,v17,v18,v19</schema.version.list>
         <schema.uri.base.path>/aai/schema-service</schema.uri.base.path>
         <!-- End of Default ONAP Schema Properties -->