Added sequence for Permissible value table. Moved the PV table sequence script from schema.xml to permissible-values.xml to keep them at single place.
Added sequence for Permissible value table.
Moved the PV table sequence script from schema.xml to
permissible-values.xml to keep them at single place.

krishagni/openspecimen,krishagni/openspecimen,krishagni/openspecimen