minor: adding namespace to SSLError

Author: estolfo

lib/mongo/util/ssl_socket.rb

@@ -51,7 +51,7 @@ def initialize(host, port, op_timeout=nil, connect_timeout=nil, opts={})
         @socket = OpenSSL::SSL::SSLSocket.new(@tcp_socket, @context)
         @socket.sync_close = true
         connect
-      rescue SSLError
+      rescue OpenSSL::SSL::SSLError
         raise ConnectionFailure, "SSL handshake failed. MongoDB may " +
                                  "not be configured with SSL support."
       end