Increase LRU max lookup limit

Summary: During S571342 LRU cleanup wasn't fully working because limit is hit. Increasing 100x.

Reviewed By: lima1756

Differential Revision: D83796403

fbshipit-source-id: d2ff1f9ac9efd478001cc1b45dd0d5e1c1e3c7f3

Author: avasylev

katran/lib/KatranLb.cpp

@@ -44,7 +44,7 @@ constexpr int kMaxInvalidServerIds = 10000;
 
 // Limit LRU lookups when traversing entire map.
 // In case high ingress results in high LRU insertion rate, affecting traversal.
-const int kLruMaxLookups = 100 * 1000;
+const int kLruMaxLookups = 10 * 1000 * 1000;
 } // namespace
 
 KatranLb::KatranLb(