Add support for reading servers list from the zoo.conf file (1/2).

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Add support for reading servers list from the zoo.conf file (2/2).

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>
Merge branch 'add-support-for-zoo-conf'

Signed-off-by: Krzysztof Wilczynski <krzysztof.wilczynski@linux.com>