Setting default tag bucket in config file

[chungquantin]

Is your feature request related to a problem? Please describe.
Using database with keyspaces like tree / column is not a very good experience. Every time we want to see the data, we have to enter the command for TREE or COLUMN.

Describe the solution you'd like
Adding a default tag bucket in EDMA config file

{
  "databases": [
   {
     "name": "sled",
     "path": ...,
+    "tags": {
+     "tree": "name-of-tree"
+     }
   }
  ]
}