Update submodules:

• balance_tracker: update-submodules-for-1.27.7rc15 (45b455fc6f4d010200ba61023dd76f65aad48c7d)
• HAfAH: update-submodules-for-1.27.7rc15 (27aa748852f94c0facfafcf63a18051a8734dc40)
• haf: update-submodules-for-1.27.7rc15 (8bcff1e9c2536034520d3c18147ef06b40c4351b)
• reputation_tracker: update-submodules-for-1.27.7rc15 (ca87c55c2a9b25bfaad34d0f7350e36f88809513)