Merge pull request microsoft#382 from corranrogue9/patch-2

updating alternate key syntax to be in line with the gateway implementation

Author: OlgaPodo

graph/patterns/alternate-key.md

@@ -63,21 +63,21 @@ Declare `mail` and `ssn` as alternate keys on an entity:
 
  <Property Name="mail" Type="Edm.String" />
  <Property Name="ssn" Type="Edm.String" />
- <Annotation Term="Keys.AlternateKeys">
+ <Annotation Term="OData.Community.Keys.V1.AlternateKeys">
  <Collection>
- <Record>
+ <Record Type="OData.Community.Keys.V1.AlternateKey">
  <PropertyValue Property="Key">
  <Collection>
- <Record>
+ <Record Type="OData.Community.Keys.V1.PropertyRef">
  <PropertyValue Property="Name" PropertyPath="mail" />
  </Record>
  </Collection>
  </PropertyValue>
  </Record>
- <Record>
+ <Record Type="OData.Community.Keys.V1.AlternateKey">
  <PropertyValue Property="Key">
  <Collection>
- <Record>
+ <Record Type="OData.Community.Keys.V1.PropertyRef">
  <PropertyValue Property="Name" PropertyPath="ssn" />
  </Record>
  </Collection>