MINIFI-484: Fixing line breaks in system admin guide.
MINIFI-484: Fixing line breaks in system admin guide.

This closes #149.

Signed-off-by: Aldrin Piri <8746015474cd01110181ed51735247560fd08de4@apache.org>

apiri/nifi-minifi,apiri/nifi-minifi,apiri/nifi-minifi