Added include of unistd.h to AttrTableTest.cc for RHEL3
Added include of unistd.h to AttrTableTest.cc for RHEL3

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