Use StringBuffer for String concatenation

* Remove @EnableDiscoveryClient and @EnableEurekaClient as there are now optional.  Fixes #2241.

This commit removes usages of commons-lang builders for equals,
hashCode and toString methods.
Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

- Remove formatter markers
- Use StringBuilder in toString method
Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Signed-off-by: Gregor Zurowski <gregor@zurowski.org>

Eureka ServerConfiguration is now auto-configuration based, instead of being explicitly specified via configuration pulled in through @EnableEurekaServer. This way specific beans can be conditionally overridden, configuration can be re-ordered.
Supports PeerEurekaNodes bean to be overridden by the user

Fixes gh-1717

Fixes gh-1546

fixes gh-1345

Breaks Spring Boot 1.3 compatibility, enables 1.5

Moving eureka.server.{expectedNumberOfRenewsPerMin,defaultOpenForTrafficCount} to eureka.instance.registry so relaxed binding can be used. Default to old values for backwards compatibility.

fixes gh-1285

Updates so CloudJacksonJson extension is properly recognized by Eureka
Server as LegacyJacksonJson.

see gh-978
fixes gh-1111

The Angel client has an idiosyncratic way of calculating an instance
id, and the Brixton client aligned with that already, but the
Brixton server did not. This change should make Brixton Eureka
Servers work with Angel clients.

See gh-978

so they don't appear on the dashboard

Fixes gh-974

Protects us against changes in Spring Boot 1.4 where the naming
convention changes.

Fixes gh-642

The super class deals with syncing to peers, so we need that
call. It still delegates to the other register method and seems
to work just fine without the override.

Fixes gh-838

Apparently we already support eureka.datacenter as an alias for
archaius.deployment.datacenter and it looks like when that code
was written we intended to support eureka.environment in a similar way.
But it was never finished off, so this change adds the necessary one
line of code.

Fixes gh-791

A new integration test ill be added in spring-cloud-samples/tests.

Fixes gh-759

EurekaBootStrap implements ServletContextListener which causes problems because of early instantiation.

fixes gh-664

fixes gh-657

fixes gh-589

get's eureka branding back.

fixes gh-627

It is good thing to make this checks because of expensive concatenation of String objects (debug messages).

fixes gh-527

When click one of the up and running instances this should open the actual instance in separate tab

Remove Servo from EurekaHealthIndicator.
Remove custom DataCenterInfo.
EurekaInstanceConfig.SID is now used as eureka id.
EurekaInstanceConfigBean.getSID falls back to metadataMap.instanceId for
backwards compatibility.