Revert "php-unit processes x4 (#5454)" (#5476)

This reverts commit 61734602dc4ebdd77e7a5493336d08561d23bb5b.

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

@@ -8,7 +8,7 @@
     "applications": {
         "benchmark": {
             "type": "php 7",
-            "processes": 112,
+            "processes": 84,
             "user": "www-data",
             "group": "www-data",
             "root": "/php/",