Enable to add new LdapDicomConfigurationExtension by CDI Producers

[gunterze]

Replace hard-coded list of registered LdapDicomConfigurationExtensions

@ApplicationScoped
public class LdapArchiveConfigurationFactory {
...
   private static final LdapDicomConfigurationExtension[] configExts() {
        return new LdapDicomConfigurationExtension[]{
                new LdapAuditLoggerConfiguration(),
                new LdapAuditRecordRepositoryConfiguration(),
                new LdapImageReaderConfiguration(),
                new LdapImageWriterConfiguration(),
                new LdapArchiveConfiguration(),
                new LdapArchiveUIConfiguration(),
                newLdapHL7Configuration()
        };
    };

by

@ApplicationScoped
public class LdapArchiveConfigurationFactory {
...
    @Inject
    private Instance<LdapDicomConfigurationExtension> configExts;

So a LdapDicomConfigurationExtension can be added by declaring its implementation class as @ApplicationScoped bean, e.g.:

@ApplicationScoped
public class LdapArchiveUIConfiguration extends LdapDicomConfigurationExtension {

or providing it by a Producer method or field, e.g.

    @Produces
    @ApplicationScoped
    private static LdapAuditLoggerConfiguration ldapAuditLoggerConfiguration =
            new LdapAuditLoggerConfiguration();