Bug 29436: ES mappings not saved if zebra is configured

Bug 29436: ES mappings not saved if zebra is configured

The mappings must be editable even if ES is not turned on yet.

Using a separate array to store the errors as we are testing for $@ ||
@messages.

There is still something wrong that should be improve, but this patch
should be safe for backport.

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit d17db253ea6ec2c96662aade8cb8d8b6665d768d)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>