Update submodules:

• balance_tracker: update-submodules-for-1.27.7rc12 (5fa5253480d929560df81467a2ae3570182fce97)
• HAfAH: update-submodules-for-1.27.7rc12 (7ae7c63ff22d34f12246e79832643ec37f8ed81c)
• haf: update-submodules-for-1.27.7rc12 (66af7b2c4cad5af7c88234f8ff44c644509373b6)
• reputation_tracker: update-submodules-for-1.27.7rc12 (4c4f18f7d371b0680ecbbce77acc13d2c763aedd)