Ensure Groovy bean builder does not enforec XML validation

Since it is not parsing XML it makes no sense to be validating
and it would cause exceptions when importing "namespace"
features. This brings the Boot usage of the bean builder inline
with that in Spring Core.

Fixes gh-630
Add test for groovy-xml parsing
Missing groovy source for test
Extend use of reflection for port in Jetty 9

There was already a reflection hack in place for logging the local
port in Jetty 8/9. It wasn't being used for the getPort() method
for some reason, so that needed to be fixed.

Fixes gh-635
Polish
Revert "Remove test dependencies from spring-boot-starter-parent"

This reverts commit 5ded496dc32770148935574ff1c649799f251413.

Fixes gh-628
Next development version
Fixup starter-parent for 1.0.2 SNAPSHOT
Fix path stripper in JolokiaEndpoint to account for management.contextPath

When the user sets management.contextPath=/admin the Jolokia
endpoint gets mapped to /admin/jolokia, but that the path stripper it uses
internally makes a false assumption about the form of the request path.
The fix is simple (just use a smarter search for the endpoint path in the
request path).

Fixes gh-642
Add test for gh-645
Fix springloaded co-ordinates

Apparently springloaded 1.1.5 was released to Maven Central with a
different groupId than to repo.spring.io. It would have worked in
milestones because the repository was declared.

See gh-648
@Controller -> @RestController in docs

Fixes gh-652
/etc/bash_completion.d -> something else

I preferred /etc/bash_completion.d (since it mirrors the actual
preferred deployment of the scripts on my OS). Maybe the MacBoys
have a different point of view? Anyway the docs now point to the
actual script location.

Fixes gh-651
@Controller -> @RestController in README

Fixes gh-652 some more
Fixed minor mistakes

* your -> you're
* ask a questions -> ask a question

Fixes gh-653
Grammar etc. fixes in the docs

Fixes gh-654
Add enabled flag to RegistrationBean

Default to true but allow user to switch off a @Bean of type
Filter (for example) by wrapping it in a disabled registration.

Fixes gh-655
Now after starting application PID file will be created

Fixes gh-550
Add parent directory creation

Also tidied a few other things up (like not needing
SmartApplicationListener).

Fixes gh-550
Minor fixes in the docs