fix Bug with updateForm method when updating input data only

[AngryBeaver]

arrays in data that changed in size needs to increase or decrease formGroup

PR Type

What changes does this PR include (check all that apply)?
[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build process changes
[ ] Documentation changes
[ ] Other... please describe:

Related issue / current behavior

if we updateForm with changes in input only the initializeForm is not triggered.

possible fixes this:
#256
maybe this:
#195

New behavior

keep it stupid simple it always rerender Form even if the change is only in data

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Any other relevant information

The Change will possibly slow down as each data change will now trigger a Form rerender but its clean simple stupid and not performance optimized as i currently do not see any problems.
CleanCode:
http://clean-code-developer.com/grades/grade-1-red/#Keep_it_simple_stupid_KISS
http://clean-code-developer.com/grades/grade-1-red/#Beware_of_Optimizations

[catull]

@AngryBeaver How about you create a PR against https://github.com/shamoons/ng-json-schema-form. Shamoon is the next maintainer of this library.