Revert "IMPALA-970 The kinit renewal command should specify the credential cache file."

This reverts commit c410059adfd28563a8acb9426e12d7de926bd1df.

Change-Id: I13173194f55f2e8a3e182a0368f9584ae759111e
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2451
Reviewed-by: Henry Robinson <henry@cloudera.com>
Tested-by: Henry Robinson <henry@cloudera.com>
Revert "CDH-18751: Impala should use a unique Kerberos credentials cache location"

This reverts commit 36327bd74c76dc69207d148cc401190fe5a9a50c.

Change-Id: I2a7fc745f24f851cf87a8b7e6c6525530cb958f7
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2450
Tested-by: jenkins
Reviewed-by: Henry Robinson <henry@cloudera.com>