disable broken ApiBlockTest::testMakeNormalBlock()

disable broken ApiBlockTest::testMakeNormalBlock()

That test has probably always been broken and use an invalid token. The
bug tracking brokenness is http://bugzilla.wikimedia.org/35646

Since the broken test is merged in master, that block the integration of
Jenkins and Gerrit by having any submitted patchset to be reported as
failling :-(

Root cause is https://gerrit.wikimedia.org/r/3434 which made the
Block/Unblock API to actually verify the token previously always
considered valid (bug 34212).

Change-Id: Iecf6b083163c214c734360b2f6d9b4bed8af07dc