added the ability to set the admin state via web-services

added the ability to set the admin state of a slice/dpid in the
web-services
can't compare strings :)
added the ability to set the admin state of a slice in the CLI
fixed a problem with disabling slices and the CLI

while fixing the CLI to work with the enable/disable of a slice, we
uncovered a problem with disabling a slice.  Specifically when the node
re-joined it would re-connect
made a small text change to the result message
Merge branch 'ISSUE=8768-enable/disable-slice-in-web-services' into 1.0.2-dev