[SPARK-9643] Upgrade pyrolite to 4.9

Includes: https://github.com/irmen/Pyrolite/pull/23 which fixes datetimes with timezones.

JoshRosen

https://issues.apache.org/jira/browse/SPARK-9643

Author: Alex Angelini <alex.louis.angelini@gmail.com>

Closes #7950 from angelini/upgrade_pyrolite_up.

core/pom.xml

@@ -339,7 +339,7 @@
     <dependency>
       <groupId>net.razorvine</groupId>
       <artifactId>pyrolite</artifactId>
-      <version>4.4</version>
+      <version>4.9</version>
       <exclusions>
         <exclusion>
           <groupId>net.razorvine</groupId>