* refact(e2e): Move Dynamic Host Catalog env to its own file
This keeps each scenario consistent (an env_test.go file in each directory)
* refact(e2e): Update to use type casting
* refact(e2e): Rename existing dynamic host catalog test
* test(e2e): Add test for an empty dynamic host catalog
This test verifies that you fail to connect to a target with an empty host set (in a dynamic host catalog)
* fix(e2e): Update return statement since we know err is nil
* fix(e2e): Add ok checks in type assertions
* test(e2e): Add database migration test
* chore(enos): Add enos scenario for migration test
* chore(enos): Update go test command to use count option
* doc(e2e): Update readme with migration test details
* Fix: Typo
* CR: Use different library
* CR: Add additional context in comment
* CR: Move some code from test into functions
* doc(e2e): Add instructions to more easily retrieve environment variables
* refact(e2e): Create some more methods to increase test readability
Michael Li