Bug 4922 Disable out of date test

Bug 4922 Disable out of date test

This test fails due to change in the way authentication is disabled in
the Beryllium release.  In prior releases, authentication could be disabled
by adding "authEnabled=false" to "etc/org.opendaylight.aaa.authn.cfg". Now,
authentication is disabled by editing shiro.ini and changing:
"/** = authcBasic" to "/** = anon".

Because Shiro properties are not currently tracked through the config admin
service, disabling AAA requires a controller restart.  This test is removed
as it is out of date and no longer reflects how to disable authentication.
A new test is not added to this suite, as controller restart is required.

Change-Id: Ia745c6d722d6a843eac69f8f3998766a8ce48c5d
Signed-off-by: Ryan Goulding <ryandgoulding@gmail.com>