tests: Fix compatibility with Ubuntu 12.04

On Ubuntu 12.04 the 'ps' command doesn't accept "-o etimes=" option. To
fix this issue this commit changes it to "-o etime=" which is supported
by both new and old Ubuntu releases.

Change-Id: I085f741b8bd26402aa65bb44418da300fa27d3e0
rpm: Add the missing 'asciidoc' dependency to lizardfs.spec

This commit adds a missing dependency to lizardfs.spec: asciidoc.
Without this package manpages are not created and the process of
building RPM packages fails.

Change-Id: I3c4de51dfdd1f50a4c4e48759f001e409bc11e9c