Default maven repository update and checksum policies

[aloubyansky]

In case update and checksum policies are not explicitly configured, e.g.

                    <id>repository-snapshots-apache</id>
                    <url>https://repository.apache.org/content/groups/snapshots</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>true</enabled>
                    </snapshots>
                </repository>

Maven will use daily and warn respectively. However maven-resolver which we use during test classloading setup will log a warning and use never as the update policy.
To keep it consistent with the Maven default behavior our maven repo initializer should use the same defaults.