[NO ISSUE][API] Support client-type parameter in QueryServiceServlet

- user model changes: no
- storage format changes: no
- interface changes: yes

Details:
- QueryServiceServlet supports 'client-type' parameter that
  indicates whether a client is a generic client or a JDBC driver
- Print field names and types in result signature if client
  is the JDBC driver
- Extract common fields from ResultsPrinter and NcResultPrinter
  into AbstractResultsPrinter
- Add testcases

Change-Id: Ia927091c9dec508b0c799ec8170765e43b847a39
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/13623
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ali Alsuliman <ali.al.solaiman@gmail.com>
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
index 65a676c..6450a1c 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -145,6 +145,11 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="api">
+      <compilation-unit name="signature">
+        <output-dir compare="Text">signature</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="api">
       <compilation-unit name="ignore-body-for-get">
         <output-dir compare="Text">ignore-body-for-get</output-dir>
       </compilation-unit>