[NO ISSUE][JDBC] Relax access modifier for getOrCreateDriverContext()

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

Details:
- Make ADBDriverBase.getOrCreateDriverContext()
  protected instead of private

Change-Id: Icde135b4df55dce631da5f74c81099fdc7794588
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb-clients/+/13704
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Dmitry Lychagin <dmitry.lychagin@couchbase.com>
Reviewed-by: Ian Maxon <imaxon@uci.edu>
diff --git a/asterixdb-jdbc/asterix-jdbc-core/src/main/java/org/apache/asterix/jdbc/core/ADBDriverBase.java b/asterixdb-jdbc/asterix-jdbc-core/src/main/java/org/apache/asterix/jdbc/core/ADBDriverBase.java
index ce4f336..613c3a9 100644
--- a/asterixdb-jdbc/asterix-jdbc-core/src/main/java/org/apache/asterix/jdbc/core/ADBDriverBase.java
+++ b/asterixdb-jdbc/asterix-jdbc-core/src/main/java/org/apache/asterix/jdbc/core/ADBDriverBase.java
@@ -210,7 +210,7 @@
         return Logger.getLogger(getClass().getName());
     }
 
-    private ADBDriverContext getOrCreateDriverContext() {
+    protected ADBDriverContext getOrCreateDriverContext() {
         ADBDriverContext ctx = context;
         if (ctx == null) {
             synchronized (this) {