Fixes #4355 - 500 error messages are ignored
fixes #4358 - unmanaged host can be now created empty
Merge pull request #86 from lzap/unmanaged-host-4358

fixes #4358 - unmanaged host can be now created empty
Fixes #4361 - api singleton broke commands for associations
Merge pull request #85 from tstrachota/fix_for_associations

Fixes #4361 - api singleton broke commands for associations
Bug #3360 - Display OS ids on template info

Stub os_ids in template tests
Merge pull request #83 from eLobato/master

Bug #3360 - Display OS ids on template info
fixes bug #4466

The accessed elements don’t have the nested levels and such all call
result in the rescue block.
fixed Error: undefined method `[]' for nil:NilClass

removed nesting level
Merge pull request #87 from tstrachota/exception_handler

Fixes #4355 - 500 error messages are ignored
Merge pull request #90 from StephanDollberg/4466_os_info

Fixes bug #4466
Merge pull request #92 from StephanDollberg/4471_sc_nil_error

Fixed Error: undefined method `[]' for nil:NilClass
fixes bug #4467

Added rescue statement which covers the case when the media has no
associated OS ids
DataField merged into Field
Merge pull request #88 from tstrachota/fields

DataField merged into Field
Merge pull request #91 from StephanDollberg/4467_media_os_ids

Fixes bug #4467
Fixes #4517 - proxy import_classes failed
Fixes #4352 - cannot create and update template
Merge pull request #95 from tstrachota/tpl_fix

Fixes #4352 - cannot create and update template
Merge pull request #94 from mbacovsky/4517_proxy_import

Fixes #4517 - proxy import_classes failed