[WIP][DD-727] add tests
[TASK][DD-492] bug specific test
[IMPROVEMENT][DD-492] Weaken usage and access to LinkedList

List has the same order semantics as LinkedList
so we needn't use LinkedList in our signatures
[TASK][DD-492] Keep order of attribute paths in Schema
[IMPROVEMENT][DD-492] minor code style improvements
[TASK][DD-492] clarify intent for equality chance
[TASK][DD-492] reorder schema methods
Merge branch 'sprint-19/dd-492' into 'builds/unstable'

DD-492

See merge request !184
[FEATURE][DD-393] added record identifier attribute path to ContentSchema (incl. tests)
[FEATURE][DD-393] added record identifier attribute path to mab content schema
[BUG][DD-651] fixed morph script builder to process filters where the common attribute path is the root level of a record
Merge branch 'sprint-18/dd-393' into 'builds/unstable'

[DD-393] added record identifier attribute to ContentSchema

See merge request !185
Merge remote-tracking branch 'dmp-master/builds/unstable' into builds/unstable
[BUG][DD-651] reordered imports
Merge branch 'bug/dd-651' into 'builds/unstable'

[DD-651] fixed morph script builder to process filters where the common attribute path is the root level of a record

See merge request !186
[TASK][DD-557] specific IDE documentation for configurations
[TASK][DD-557] improve docs for tomcat configuration
Merge branch 'builds/unstable' into 'builds/unstable'

Improve configurations documentation

See merge request !187
[BUG][DD-730] XMLSchemaParser first draft
[BUG][DD-730] finished first draft for attribute path parsing