DDF-383 Fix test that fails in some timezones (UTC+7 or more).

getInstance() with no arguments uses local timezone, so the check for day of
month will return 4 (instead of the expected 3) for some timezones.

If we getInstance with UTC timezone, it'll work reliably.
DDF-384: fixed CSW test cases to work if system time is UTC
DDF-386 - updated config for WFS and CSW source to force a single Spatial Filter
DDF-384: Removed unused jodatime formatter from CSW code
Merge branch 'ddf-383' of http://github.com/bradh/ddf-spatial into bradh-ddf-383
[maven-release-plugin] prepare release ddf-spatial-2.4.0
[maven-release-plugin] prepare for next development iteration
DDF-389: Update platform version to 2.3.1
DDF-393: Added logic to compare the AttributeFormat of MetacardTypes instead of the type itself, in order to avoid failures on Object.equals on two different instances which use the same format