Reset interpreter env after lambda call

[kettlebell]

Close #730.

[coveralls]

Pull Request Test Coverage Report for Build 6503468789

• 78 of 90 (86.67%) changed or added relevant lines in 10 files are covered.
• 11 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.01%) to 80.817%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ergotree-interpreter/src/eval/coll_exists.rs	5	6	83.33%
ergotree-interpreter/src/eval/coll_filter.rs	5	6	83.33%
ergotree-interpreter/src/eval/coll_fold.rs	5	6	83.33%
ergotree-interpreter/src/eval/coll_forall.rs	5	6	83.33%
ergotree-interpreter/src/eval/coll_map.rs	5	6	83.33%
ergotree-interpreter/src/eval/scoll.rs	5	6	83.33%
ergotree-interpreter/src/eval/apply.rs	10	12	83.33%
ergotree-interpreter/src/eval/block.rs	24	26	92.31%
ergotree-interpreter/src/eval/soption.rs	10	12	83.33%

Files with Coverage Reduction	New Missed Lines	%
ergo-merkle-tree/src/merkletree.rs	2	97.39%
ergo-merkle-tree/src/batchmerkleproof.rs	3	90.48%
ergotree-ir/src/serialization/types.rs	6	83.28%

Totals
Change from base Build 6481852424:	0.01%
Covered Lines:	10604
Relevant Lines:	13121

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💛 - Coveralls

[kettlebell]

This code breaks the diag_on_reduced_to_false test. We might need to make an exception for the global BlockValue of a script, and do not delete introduced ValIds?

[greenhat]

Thank you for taking care of this! Ideally, yes. If not, feel free to make the test ignored/commented.

[kettlebell]

No problem! Made the change so ValDefs in global block persist.

[greenhat]

Looking great! Thank you!