[schema] Move df-specific types into df schema

Complex numbers as parameter types are only supported in
dataformats

See #74

beat/core/schema/common/1.json

@@ -23,8 +23,6 @@
         "uint64",
         "float32",
         "float64",
-        "complex64",
-        "complex128",
         "bool",
         "string"
       ]

beat/core/schema/dataformat/1.json

@@ -15,6 +15,7 @@
     "^[a-zA-Z_][a-zA-Z0-9_-]*$": {
       "oneOf": [
         { "$ref": "../common/1.json#/definitions/basetype" },
+        { "$ref": "#/definitions/complextypes" },
         { "$ref": "#/definitions/array1d" },
         { "$ref": "#/definitions/array2d" },
         { "$ref": "#/definitions/array3d" },
@@ -29,6 +30,13 @@
   "additionalProperties": false,
 
   "definitions": {
+    "complextypes": {
+      "type": "string",
+      "enum": [
+        "complex64",
+        "complex128"
+      ]
+    },
 
     "array1d": {
       "type": "array",