[SPARK-5933] [core] Move config deprecation warnings to SparkConf.

I didn't find many deprecated configs after a grep-based search,
but the ones I could find were moved to the centralized location
in SparkConf.

While there, I deprecated a couple more HS configs that mentioned
time units.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #5562 from vanzin/SPARK-5933 and squashes the following commits:

dcb617e7 [Marcelo Vanzin] [SPARK-5933] [core] Move config deprecation warnings to SparkConf.

1 files changed, 7 insertions, 8 deletions

diff --git a/docs/monitoring.md b/docs/monitoring.md
index 2a13022459..8a85928d6d 100644
--- a/docs/monitoring.md
+++ b/docs/monitoring.md
@@ -153,19 +153,18 @@ follows:
     </td>
   </tr>
   <tr>
-    <td>spark.history.fs.cleaner.interval.seconds</td>
-    <td>86400</td>
+    <td>spark.history.fs.cleaner.interval</td>
+    <td>1d</td>
     <td>
-      How often the job history cleaner checks for files to delete, in seconds. Defaults to 86400 (one day).
-      Files are only deleted if they are older than spark.history.fs.cleaner.maxAge.seconds.
+      How often the job history cleaner checks for files to delete.
+      Files are only deleted if they are older than spark.history.fs.cleaner.maxAge.
     </td>
   </tr>
   <tr>
-    <td>spark.history.fs.cleaner.maxAge.seconds</td>
-    <td>3600 * 24 * 7</td>
+    <td>spark.history.fs.cleaner.maxAge</td>
+    <td>7d</td>
     <td>
-      Job history files older than this many seconds will be deleted when the history cleaner runs.
-      Defaults to 3600 * 24 * 7 (1 week).
+      Job history files older than this will be deleted when the history cleaner runs.
     </td>
   </tr>
 </table>