reverted meta-data deletions from previous commits, these did break the production server

meta_info/nomad_meta_info/exciting.nomadmetainfo.json

@@ -238,6 +238,13 @@
       "superNames": [
         "section_scf_iteration"
       ]
+    }, {
+      "description": "Core charge",
+      "dtypeStr": "f",
+      "name": "x_exciting_core_charge",
+      "superNames": [
+        "section_system"
+      ]
     }, {
       "description": "Core charge",
       "dtypeStr": "f",
@@ -1190,6 +1197,13 @@
         "section_system"
       ],
       "units": "m^3"
+    }, {
+      "description": "Valence charge",
+      "dtypeStr": "f",
+      "name": "x_exciting_valence_charge",
+      "superNames": [
+        "section_system"
+      ]
     }, {
       "description": "Valence charge",
       "dtypeStr": "f",