test: bump test-run to version w/ updated luatest

Bump test-run to new version with the following improvements:

- Bump luatest to 0.5.7-27-g42d4e24 [1]

[1] tarantool/test-run@ea517ac

NO_DOC=testing stuff
NO_TEST=testing stuff
NO_CHANGELOG=testing stuff

(cherry picked from commit ba7b967e)

test-run @ ea517ac0

-Subproject commit 7c77fcb67d6ae034dc2784194813dd54b5bfaad2
+Subproject commit ea517ac07095c4b3bd2acde5de86ef32856c585d