Update mariadb-connector-j to 2.3.0

MariaDB connector now supports connection pool.

See release notes:

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.0

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.1

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.2

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.3

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.4

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.5

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.2.6

* https://github.com/MariaDB/mariadb-connector-j/releases/tag/2.3.0

Change-Id: I1698ee9fb53e784548542c973c554bc70c45c872

gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/libraries.config

diff --git a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/libraries.config b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/libraries.config
index a82edb32..3d3545b 100644
--- a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/libraries.config
+++ b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/init/libraries.config
@@ -19,9 +19,9 @@
   remove = mysql-connector-java-.*[.]jar
 
 [library "mariadbDriver"]
-  name = MariaDB Connector/J 2.1.2
-  url = https://repo1.maven.org/maven2/org/mariadb/jdbc/mariadb-java-client/2.1.2/mariadb-java-client-2.1.2.jar
-  sha1 = 002484a99a6a86491531d17d491c931de8942ae0
+  name = MariaDB Connector/J 2.3.0
+  url = https://repo1.maven.org/maven2/org/mariadb/jdbc/mariadb-java-client/2.3.0/mariadb-java-client-2.3.0.jar
+  sha1 = c2b1a6002a169757d0649449288e9b3b776af76b
   remove = mariadb-java-client-.*[.]jar
 
 [library "oracleDriver"]