Change default LZO parent dir to $IMPALA_HOME/..
Change default LZO parent dir to $IMPALA_HOME/..

The old default was $HOME. More likely, the LZO dirs will be next to the
Impala dir.

Change-Id: Id7ae6cc1419a613666e58c23a089d39f7bb33fc3
Reviewed-on: http://gerrit.cloudera.org:8080/1540
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala