Fixes gh-2421

Use StringBuffer for String concatenation

See https://github.com/spring-cloud/spring-cloud-commons/issues/265

Updates to 2.0.0

fixes gh-2216

* 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-1616

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.