renameAttr/renameRel in Schema layer do not check for E_INVALID

[SaintNerevar]

A check for E_INVALID must be included before the check for E_RELOPEN since the catalogs are always open.

[gokulsreekumar]

Done

• The error code is changed from E_INVALID to E_NOTPERMITTED
• The same check added to all methods in Schema wherever relavant.
  • deleteRel, createIndex, dropIndex, renameRel, renameAttr, closeRel

[SaintNerevar]

All good!