Closes #971

Up to now we have been treating the *first* class to be compiled
as the "main" application and adding @EnableAutoConfiguration. This
isn't always appropriate (e.g. if it's a test case), so now we
look for an appropriate annotation before falling back to the old
behaviour.

In addition ensures classes with a field of type Reactor trigger
the reactor auto imports.

See gh-969

Fixes gh-970

JUnit tests can now be @SpringApplicationConfiguration
and @IntegrationTest without any explicit imports. Also
makes @RunWith(SpringJUnit4ClassRunner) optional.

Fixes gh-969

Update JasperInitializerLifecycleListener to call JasperInitializer as
a ServletContainerInitializer (not a ServletContextInitializer).

Fixes gh-962
See gh-919

when server.servletPath is set we need to add prefixes to
the security filter paths, and the /error path.

Conflicts:
	spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/ManagementSecurityAutoConfiguration.java

Unify the versions used in integration tests launched by the
maven-invoker-plugin. Allows for already cached local copies to be
used, hopefully speeding up the build.

Add a `local.management.port` alias when the management server is
running on the same port as the main server.

Fixes gh-952

Rename TraceWebFilterAutoConfigurationTest to
TraceWebFilterAutoConfigurationTests

Fixes gh-961

Closes #960

The early re-ordering (and in particular the temporary remove of the
default properties) seemed to be a relic of an older approach that is
no longer there since we refactored to support more sane profile ordering.
Removing it doesn't seem to break anything and it allows you to specify
the config file locations in SpringApplicationBuilder.properties().

Fixes gh-953, fixes gh-920

This reverts commit 50ea717a.

Hopefully allowing us to release

Downgrade the Reactor version since we cannot depend on snapshots for
the M2 release.

See gh-845

Relates to gh-667

This commit clarifies how @IntegrationTest can be used as an
alternative of starting the (web) application prior to running the
tests suite.

Fixes gh-667

Then non-enumerable property sources will be accessible (like
SystemProperties in principle). This is the same way that other
beans are bound to the environment, but this one never got the
same treatment.

Fixes gh-951, gh-934

Fixes gh-948

Either set flyway.[url,user,password] or create a DataSource
@Bean and mark it @FlywayDataSource.

Fixes gh-807

New feature in Spring Mobile (user preferences per site).

Fixes gh-946

See gh-948

Instead of *always* needing to pull auto-import dependencies
from the master parent pom, we now allow normal @Grab-style
module specifications, e.g. "io.ratpack:ratpack-groovy:0.9.2"

* fixdoc:
  Fix table row format in documentation