type:internal
For LIGO developers
test_exec_error and test_exec_result do not need to be preloaded in environment anymore.
This MR declares them in the testlib. It also handles part 2 of issue #1399 (closed) by creating a test_exec_error_balance_too_low.
It closes #1399 (closed)
Changelog details:
New type test_exec_error_balance_too_low
A new type test_exec_error_balance_too_low has been added to testing framework. It represents the data returned by Balance_too_low case in test_exec_error.