Revert "Updated unit to 128 processes (#4988)" (#4991)

This reverts commit 1718d7e7bdd119e7ce9974e7c2cfb0c2136d2e5f.

frameworks/PHP/php/deploy/nginx-unit.json

@@ -8,7 +8,7 @@
     "applications": {
         "benchmark": {
             "type": "php 7",
-            "processes": 128,
+            "processes": 64,
             "user": "www-data",
             "group": "www-data",
             "root": "/php/",