[CONFIG] Adjusted RAM use for GLnexus rule

Adjusted high RAM use for glnexus rule, brought lower to be more in line with what is expected

Author: jng2

cluster_config.json

@@ -32,11 +32,11 @@
     "glnexus_hc":
     {
         "n":32,
-        "mem": "128G"
+        "mem": "70G"
     },
     "glnexus_dv":
     {
         "n":32,
-        "mem": "128G"
+        "mem": "70G"
     }
 }