More changes in pom recommended by maven central

See http://maven.apache.org/guides/mini/guide-central-repository-upload.html
and https://docs.sonatype.org/display/Repository/Central+Sync+Requirements

It is important that the repositories section is moved to a ~/.m2/settings.xml
such as:

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
	<localRepository/>
	<interactiveMode/>
	<usePluginRegistry/>
	<offline/>
	<pluginGroups/>
	<servers/>
	<mirrors/>
	<proxies/>
	<profiles>
		<profile>
			<id>kurento</id>
			<activation>
				<activeByDefault>true</activeByDefault>
			</activation>
			<repositories>
				<repository>
					<id>kurento-snapshots</id>
					<name>Kurento Snapshot Repository</name>
					<url>http://repository.kurento.com/archiva/repository/snapshots/</url>
					<releases>
						<enabled>false</enabled>
					</releases>
					<snapshots>
						<enabled>true</enabled>
					</snapshots>
				</repository>
				<repository>
					<id>kurento-releases</id>
					<name>Kurento Repository</name>
					<url>http://repository.kurento.com/archiva/repository/internal/</url>
					<releases>
						<enabled>true</enabled>
					</releases>
					<snapshots>
						<enabled>false</enabled>
					</snapshots>
				</repository>
			</repositories>
		</profile>
	</profiles>
	<activeProfiles/>
</settings>

Change-Id: Id9f6eec5b8c09a65b242f9109acfe45be11b6d64