Fix some CVE warnings in tests

Output like "!MESSAGE Using unsafe http transport to retrieve
http://eclipse.org/equinox/foobar/abcdefg, see CVE-2021-41033. Consider
using https instead." just pollutes the log. Use https:// despite the
fact it's testing non-existing content.

Change-Id: Id221aed3864b3a909f00b264573b8f1757b12609
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.p2/+/188667
Tested-by: Equinox Bot <equinox-bot@eclipse.org>
2 files changed