Add test for inaccessible configuration class

See gh-948
Add Spring Mobile SitePreferenceAutoConfiguration

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

Fixes gh-946
Add options for Flyway to have its own DataSource

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

Fixes gh-807
Ensure startup error is logged (and rethrown)

Fixes gh-948
Fix bug in DataSourceBuilder
Use PropertiesConfigurationFactory to bind to SpringApplication

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
Integration tests documentation

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
Fix typo

Relates to gh-667
Polish
Downgrade to Reactor 1.1.0

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

See gh-845
Add parent to prepare build

Hopefully allowing us to release
Add spring-boot-versions to the full build
Next development version
Revert "Add spring-boot-versions to the full build"

This reverts commit 50ea717a0b83bdd1de349e37e494c0c0fc275c46.
Remove misplaced re-ordering of default property source

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
Upgrade to Tomcat 7.0.54

Closes #960
Merge branch '1.0.x'
Fix a couple of velocity documentation issues

Fixes gh-961
Introduce Health.Builder to clean up HealthIndicator implementations
Rename TraceWebFilterAutoConfigurationTest

Rename TraceWebFilterAutoConfigurationTest to
TraceWebFilterAutoConfigurationTests