Bug 1004160 - admin console stats graphs fail to load with arg error
<admin suggestions> fix bug 1004157

https://bugzilla.redhat.com/show_bug.cgi?id=1004157
Admin console suggestions suggest adding nodes to district NONE which is
impossible
<admin suggestions> fix bug 1004297

https://bugzilla.redhat.com/show_bug.cgi?id=1004297
unexpected type Capacity::Add::District in admin console

When suggesting the addition of a district, that suggestion accidentally
overwrote the wrapper suggestion; since it's a subclass, the difference
was not noticed immediately.
<admin suggestions> allow 1-node districts

Previously districts always got at least 2 nodes (else why have them?)
however in the case where gears are just used for compartmentalized
storage and almost all are idle, it can make sense to have just one node
in a district. The district then doesn't serve much purpose, but you'll
need it if you have set districts to be required for the installation.
It's sort of an odd use case but it is allowed.
<admin console> lower default active% to 5