Add tests for drop table and drop schema

Registered by Lee Bieber

Need to add more tests that cover dropping tables and schema. This should include:
- Testing of concurrency during execution
- Testing for all the various storage engines

Blueprint information

Status:
Not started
Approver:
None
Priority:
Low
Drafter:
None
Direction:
Needs approval
Assignee:
None
Definition:
Approved
Series goal:
Accepted for trunk
Implementation:
Not started
Milestone target:
milestone icon future

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