Merge pull request #146 from NiteshKant/master

Fixes issue #145
Merge pull request #148 from NiteshKant/master

Fixes issue #147
[Gradle Release Plugin] - pre tag commit:  '1.1.135'.
[Gradle Release Plugin] - new version commit:  '1.1.136-SNAPSHOT'.
Adding auth headers to eureka client and server outbound requests.
Adding filter to optionally log auth headers in eureka server.
Renaming of classes and filters for more clarity
Removing config for identity header filters.
Changing default config for server identity logging to true.
Merge pull request #142 from qiangdavidliu/add-auth-headers

Adding auth headers
[Gradle Release Plugin] - pre tag commit:  '1.1.136'.
[Gradle Release Plugin] - new version commit:  '1.1.137-SNAPSHOT'.
Enabling registration for non-amazon datacenters on server startup.

`PeerAwareInstanceRegistry` disregards any non-amazon instances got from a peer on initial startup. This change enabled the registration.

Changes were discussed as part of pull request: https://github.com/Netflix/eureka/pull/134