Use siesta 1.5.1
release: 2.7.0-m1
update to next version: 2.7.0-SNAPSHOT
Fixing the forceBaseURL parameter propagation.

Related to
bbb570cddae1576c2fa5bcb8c6a3ae9cd1c9e97b
No code change.

Only method order in interface and Javadoc cleanup.
Original commit mixed up the new and old method, and
old methods got the "since 2.7" and javadoc.

related to
bbb570cddae1576c2fa5bcb8c6a3ae9cd1c9e97b
Merge remote-tracking branch 'origin/master' into NEXUS-5873-auto-enable-ruthauth-realm