RandomAttributeGenerator names its generated attribute arrays

Also, clean-up the tests for RandomAttributeGenerator and BrownianPoints
and added a 'see also' section for the two classes.

Change-Id: Ia9886c91743c80ce92cae8176b55d43553d4dcf3
RandomAttributeGenerator can generate attributes constant within a block

Added a test for this feature as as well.

Change-Id: I8d56c324c51c19f5f795a92e5074b13f1b58af4b
Merge topic '14256-random-attribute-generator' into master

5bad3ea5 RandomAttributeGenerator can generate attributes constant within a block
995272cc RandomAttributeGenerator names its generated attribute arrays