As of Hazelcast 3.7, the bootstrap is pretty slow by default due to the
networking discovery. This commit disables both TCP/IP and multicast
discoveries.

Closes gh-8443

* gh-7221:
  Polish "Tighten up PropertiesLauncher's contract"
  Tighten up PropertiesLauncher's contract

See gh-8346
Closes gh-7221

The main changes are:

- Switch to `loader.properties` instead of `application.properties`
- Search for `loader.properties` in `loader.home` as well as in
  the classpath
- Placeholder replacements in MANIFEST.MF (using `loader.properties`
  or system/env vars)

See gh-7221
Closes gh-8346

This commit makes sure that if `local.mongo.port` is set, a `MongoClient`
on the embedded MongoDB instance is created. When an embedded instance
is detected, only the `host` property is used and the `uri` is ignored if
set.

This makes sure that the auto-configured `MongoClient` automatically
switches to the embedded server, even if a production uri has been
specified.

Closes gh-8219

Closes gh-8444

Closes gh-8431

* pr/8143:
  Fix indentation
  Clarify usage of @ImportResource in doc

Closes gh-8143

See gh-8143

* pr/8460:
  Upgrade to Spring Integration 4.3.8.RELEASE

Closes gh-8460

Closes gh-8461

* pr/8227:
  Refine engine counter logic
  Polish web containers stop contribution
  Ensure web containers are stopped after close

Update counter logic to prevent negative values. Since the stop method
can now be called more than once, it was possible for the counter to
move into negative values.

See gh-8227

See gh-8227

Update `EmbeddedServletContainer` implementations to ensure that stop
can be called even if start has not. This allows servers that are
partially started during `initialize()` to still be shut down.

This commit fixes a regression caused by commit 0af53b36.

See gh-8036
Fixes gh-8224
Closes gh-8227

Update `HealthMvcEndpoint` to respect `ManagementServerProperties`
roles. Prior to this commit the `HealthMvcEndpoint` directly loaded
roles rather than using bound properties. This meant that list values
from yaml were not respected.

Fixes gh-8314

Update DataSourceInitializedPublisher to always attempt to obtain the
published DataSource directly from the EntityManager. In the case where
the EntityManager doesn't provide a DataSource, the previous logic is
used.

Fixes gh-8296