Move tests/sys/geom/eli/... to tests/sys/geom/class/eli/...
This change moves the tests added in r313962 to an existing directory
structure used by the geli TAP tests.
Note: ObsoleteFiles.inc and etc/mtree changes haven't been included in
the CR. Once I get through some other CRs (since I have a single svn
tree), I'll update this diff.
MFC after: 2 weeks
X-MFC with: r313962, r313972, r313973
Sponsored by: Dell EMC Isilon