Remove search widget from distrofamily page.

This was an accidental addition in 0.15, thus it is being removed.

Bug: 1021425
Change-Id: I6dfcb31b01b4923868fffbdf3ae00f67d160d1f0
Flask utility helpers

Change-Id: I5f1f8446cc0ee03e234e769c2c3cdd8cd128e1c9
Fix client side validation for system's FQDN.

This patch fixes the client side validation which checks if the FQDN is
an empty string during adding a new system or editing an existing one.

Bug: 1021737
Change-Id: Ie794dc6204cce09717c3081fb89d689600df1480
bkr policy-list: Add support for filtering

This patch adds the ability to filter results of `bkr policy-list`. This
will allow retrieving all policy rules, policy rules for a particular
user, for a particular group or for those only applicable to the user.

Bug: 1014899
Change-Id: I4fba5f824110f2110e126a4ea9b97360f2bad328
Refactoring to make use of Flask helper methods
rpmbuild.sh: git builds count as pre-release of the next version

This avoids the situation where a newer RPM release has been built (e.g.
0.15.1-2) which compares higher than the RPM EVR for git builds
(0.15.1-1.git.123.abcdef).

Change-Id: I20a53260610fb477390aed9f074609d7c503a6ac
Merge branch 'release-0.15' into develop