Move Spring Social and Spring Mobile configuration

This commit uses dedicated Properties classes instead of accessing
the raw environment for Spring Social and Spring Mobile. This
improves the readability and the discovery of such properties.

Fixes gh-1238
Fix typo
Use @ConfigurationProperties for Spring Batch

Fixes gh-1249
Use @ConfigurationProperties for Thymeleaf

Fixes gh-1250
Use @ConfigurationProperties for Thymeleaf

Add missing properties to complement 6568495

Fixes gh-1250
Missing setter on spring.batch.job.names property

Relates to gh-1249
Remove duplicate dependencies
Dependencies for json-path in BOM
Fix LoggingApplicationListener

- If `logging.config` is set and could open/read the resource
then, return.
  - Currently, it logs warning though the resource is successfully
read.
Upgrade to Groovy 2.3.4

Closes #1224
Upgrade to HikariCP 1.4.0

Closes #1220
Merge branch '1.1.x'
Merge branch '1.1.x'
Add dependency management for spock-spring and document its use

Closes #1234
Merge branch '1.1.x'
Add OnPropertyValueCondition annotation

This commit adds a new conditional annotation that checks if a
property has a given value. This allows to replace constructs
such as

@ConditionalOnExpression("'${app.myProperty:foo}' == 'foo'")

to

@ConditionalOnPropertyValue(property="app.myProperty",
        value="foo", defaultMatch=true)

Which is definitely more verbose but has the following advantages:

1. Works by default if the actual property in the environment is
   a bit different (i.e. my-property)
2. Works if the value of the property has a diferent case (FoO or
   FOO would match)
3. Gives a precise reporting in the auto configuration report

The defaultMatch flag is meant to mention that the condition should
also match if the value is not set; the auto-config report would
also have an explicit report about it.

Fixes gh-1000
Ensure properties that are not enumerable can be resolved from placeholders

Before this change a property whose key was in a non-enumerable property source would
not resolve placeholders, leading to ${style} values in @ConfigurationProperties beans
even if the placeholders ere resolvable.
Merge branch '1.1.x'
Merge @ConditionalOnPropertyValue

This commit merges the features of @ConditionalOnPropertyValue
to the existing @ConditionalOnProperty.

The "match" attribute provides the value to match against. By default,
the value should not be equal to "false" which is the existing default
of @ConditionalOnProperty. "defaultMatch" specifies if the value
should be present. The default matches also the existing behavior of
@ConditionalOnProperty.

Fixes gh-1000
Replace @ConditionalOnExpression

This commit replaces @ConditionalOnExpression instances that are
checking for a specific value to @ConditionalOnPropertyValue