It can just catch all exceptions from the remote /user endpoint
because in a resource server it needs to throw `InvalidTokenException`
and in an SSO setting it will never be called.

Fixes gh-3205

See gh-3088

Fixes gh-3088

Allow the Restarter to be disabled via a System property.

Fixes gh-3173

Previously, spring.groovy.template.configuration.* was mapped onto both
GroovyTemplateProperties.configuration and GroovyMarkupConfigurer. The
former being a Map and the latter being specific type with getters and
setters. This clash caused problems with the IDE support.

GroovyTemplateProperties.configuration appeared to be dead code so it
was removed in 326bdf29. Unfortunately this broke the use of
spring.groovy.template.configuration.* properties as
GroovyTemplateProperties uses a prefix of spring.groovy.template and it
no longer had a configuration property.

This commit addresses the problem by updating GroovyTemplateProperties
to ignore unknown fields. This allows
spring.groovy.template.configuration.* properties to be used and bound
to GroovyMarkupConfigurer without reintroducing the clash which prompted
the initial change.

Closes gh-3198

Closes gh-3124

Closes gh-3051

Closes gh-3195

Closes gh-3194

Closes gh-3192

Closes gh-3189

Closes gh-3188

Closes gh-3187

Closes gh-3186

Closes gh-3185

Closes gh-3184

Closes gh-3183

Closes gh-3182

Closes gh-3180

Closes gh-3179

Closes gh-3176

Closes gh-3191

Closes gh-3190

Review 105039cd that still refer to "lifecycle" instead of "admin". In
particular, harmonized the configuration properties.

Closes gh-3124

If the `repackage` goal defines an output directory that does not exist,
the maven plugin now creates it.

Closes gh-3136

Fixes gh-3168

Remove explicit TestFailedException catch in CommandRunner and instead
rely on the fact that TestFailedException extends CommandException.

Fixes gh-3167