Updated the cpp-driver to the latest 2.2.1 tag

mpenick · mpenick · commit a9a90a623eb7 · 2015-11-20T08:54:44.000-07:00
diff --git a/lib/cpp-driver b/lib/cpp-driver
@@ -1 +1 @@
-Subproject commit f4b47c617e92165256930d0a97b179f29aa86ab3
+Subproject commit f19b1abee4627a45df7b2873d45136d4706c8e07
