Fix JDBC-178 by cleaning up properties hash map

Author: seancorfield

CHANGES.md

@@ -1,5 +1,6 @@
 Changes coming in 0.7.10
 
+* Clean up `db-spec` options that are passed to the JDBC connection manager as properties [JDBC-178](https://dev.clojure.org/jira/browse/JDBC-178).
 * Relax restriction on `create-table-ddl` column specs to allow numbers (as well as keywords and strings) [JDBC-177](https://dev.clojure.org/jira/browse/JDBC-177).
 
 Changes in 0.7.9

src/main/clojure/clojure/java/jdbc.clj

@@ -398,7 +398,7 @@ http://clojure-doc.org/articles/ecosystem/java_jdbc/home.html"}
                           host
                           (when port (str ":" port))
                           db-sep dbname))
-           etc (dissoc db-spec :dbtype :dbname)]
+           etc (dissoc db-spec :dbtype :dbname :host :port :classname)]
        (get-driver-connection classname subprotocol db-spec
                               url etc opts
                               (str "Unknown dbtype: " dbtype)))