[bug 1025925] Changeall instances of fjord.analytics.tools to fjord.analytics.utils

This changes all references of the former fjord/analytics/tools.py file to reference the currently fjord/analytics/utils.py file.
Lines changed:
* fjord/analytics/analyzer_views.py - line 30
* fjord/analytics/tests/test_tools.py - line 6
* fjord/analytics/views.py - line 22