Closes gh-12361

* pr/12365:
  Remove a redundant trailing slash in doc

Closes gh-12365

See gh-12365

Closes gh-12364

This commit fixes a NPE when the static-locations array of
`ResourceProperties` has to be expanded as the setter is cleaning the
values of the array and is affected by a non-intuitive behaviour of the
binder.

When the binder needs to set an element of an array and the size of the
array isn't large enough, the binder proceeds as follows:

* An array of the required size is created
* The content of the original array is copied over
* The setter of the property is invoked with the new array
* The setter of the property is invoked and the returned array is
mutated to set the requested value

While one would expect the array to contain the requested value when the
setter is invoked, this is not the case. Also, the array might contain
null values if a value at index 8 should be set and the array has a size
of 3.

All in all, `ResourceProperties#appendSlashIfNecessary` has to account
for `null` and an additional round of cleaning has to happen once
binding has completed.

Closes gh-12360

Fixes gh-12354

Closes gh-12350

See gh-12350

Closes gh-12299

Closes gh-12345

See gh-12344

* gh-12342:
  Fix link to Spring Data JPA in docs

Closes gh-12342

Closes gh-12325

Closes gh-12312

* gh-12324:
  Polish "Improve docs on custom metrics"
  Improve docs on custom metrics

Closes gh-12324

See gh-12324

* gh-12337:
  Remove workaround for JDK-8023130 in RunProcess

With JDK 8 being the baseline and JDK 7 not being supported anymore we
can get rid of the workaround for a JDK 7 bug in
ProcessBuilder.inheritIO on Windows machines.

Closes gh-12337

See gh-12340

Closes gh-12330

See gh-12028

See gh-12028

See gh-12028

See gh-12028

See gh-12028

See gh-12028

* pr/12326:
  Polish contribution
  Polish

Closes gh-12326

See gh-12326