Fix sequence checks in solomachine

[bluele]

Description

This PR fixes sequence checks in solomachine client.

My understanding of ics-006 is that the verification function must receive the latest sequence. Is that correct?

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #7586 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #7586   +/-   ##
=======================================
  Coverage   54.15%   54.15%           
=======================================
  Files         606      606           
  Lines       38187    38187           
=======================================
  Hits        20680    20680           
  Misses      15410    15410           
  Partials     2097     2097           

[colin-axner]

Correct, nice catch!

[cwgoes]

ACK, thanks