Removed two tests that fail on machines where the tests are run as root.
Removed two tests that fail on machines where the tests are run as root.

M HTTPCacheTest.cc


OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4