Clean up angular build config

[Ryan McNally]

The report app used to be two applications - one for the index page and one for the detail page. This worked OK, but it meant that reports carried two copies of a bunch of javascript - all the low-level angular stuff.
We did the work to unify the applications and eliminate the duplication, but I've just spotted a remnant that could be cleaned up:

• The build-all scripts entry (this used to build both apps) - this can be deleted
• The two places in the pom file where build-all is invoked - these can invoke build instead

This search shows them.