feat(webapp): add filter demo data

related to #CAM-2632
refactor(jshint): add .jshintrc file for e2e tests
improve(grunt): add a skip-tests option and minor rework on Gruntfile
refactor(example): add some JS demonstrating SDK integration
fix(example): remove debugger statement
test(UI-TEST/admin): check Authorizations Filter

related to #CAM-2650
test(UI-TEST/admin): test groups backslash names

related to #CAM-2391
chore(demo-data): add filters with expressions

related to #CAM-2629
chore(webapp): add test data for serialized
Merge branch 'master' of github.com:camunda/camunda-bpm-webapp
fix(demo): change package declaration
test(UI-TEST/tasklist): add filter tests

- check create/edit/delete filter functions
- add basic page objects for task filter

related to #CAM-2648 and #CAM-2651
chore(webapp): adjust demo data
chore(demo): form validation
test(UI-TEST/tasklist): test add filter variables

related to #CAM-2649
 chore(release): Prepare release: set version to 7.2.0-alpha5
 chore(release): Prepare next development version: 7.2.0-SNAPSHOT
chore(maven): update release-parent to 2.4

- update parent
- remove unnecessary configurations which are now provided through release-parent

related to #CAM-2727
test(UI-TEST/tasklist): test filter refresh

related to #CAM-2772
test(UI-TEST/tasklist): test filter result

related to #CAM-2794