[Common] Cert and Storage rework (#191)

* Add IX-Cert to Common
and:
- split storage
- merge custom into common chart

* Integrate most of the Bitnami Common Chart into ours

features_capability.json

@@ -22,5 +22,13 @@
   "definitions/nodeIP": {
     "stable": {"min":  "20.12-ALPHA"},
     "nightlies": {"min":  "20.12-MASTER"}
+  },
+  "definitions/certificate": {
+    "stable": {"min": "21.02-ALPHA"},
+    "nightlies": {"min": "21.02-MASTER"}
+  },
+  "definitions/certificateAuthority": {
+    "stable": {"min": "21.02-ALPHA"},
+    "nightlies": {"min": "21.02-MASTER"}
   }
 }