openlavadmin -> openlavaadmin (typo corrected in all cases)

Signed-off-by: Roy Storey <roy.storey@plantandfood.co.nz>
making the AC_ARG_VAR(openlavacluster) useful WRT config and ${prefix}/etc/lsf.cluster.NAME

Signed-off-by: Roy Storey <roy.storey@plantandfood.co.nz>