v0.26.7

This is a patch release for the AliECS v0.26 series, bringing an updated Bookkeeping API interface, changes in the repo ssh auth operation along with documentation updates.

• bookkeeping:
  * [core] Add epn_topology for Bookkeeping
• repo:
  • [repo] Disable strict host checking for ssh auth
• misc:
  • [misc] Update documentation URLs
• apricot:
  • [apricot] The documentaton to explain how to use the TCE is created.
  • [apricot] The documentation for the apricot TCE has concrete examples.