Merge pull request #389 from sklump/cred-eager-canon

do not canonicalize attr names in cred previews: retain raw as per in…

aries_cloudagent/protocols/issue_credential/v1_0/messages/inner/credential_preview.py

@@ -6,7 +6,6 @@
 from marshmallow import fields, validate
 
 from ......messaging.models.base import BaseModel, BaseModelSchema
-from ......messaging.util import canon
 from ......wallet.util import b64_to_str
 
 from ...message_types import CREDENTIAL_PREVIEW
@@ -33,7 +32,7 @@ def __init__(self, *, name: str, value: str, mime_type: str = None, **kwargs):
         """
         super().__init__(**kwargs)
 
-        self.name = canon(name)
+        self.name = name
         self.value = value
         self.mime_type = mime_type.lower() if mime_type else None