finagle-http: Rename lime to time

Problem

Access logs do not contain any information about limes.

Solution

Rename lime to time.

RB_ID=802287

finagle-http/src/main/scala/com/twitter/finagle/http/filter/LoggingFilter.scala

@@ -73,7 +73,7 @@ class CommonLogFormatter extends LogFormatter {
   *   %l: remote logname
   *   %u: remote user
   *   %t: time request was received
   *   %r: request lime
   *   %r: request time
   *   %s: status
   *   %b: bytes
   *