DDC-4003: [GH-1559] Entity cache key is built differently on read than on write

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of guiwoda:

Url: #1559

Message:

Related to #1552, cache keys are scattered throughout L2 implementation and are built inconsistently.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1559] was labeled:
#1559

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1559] was assigned:
#1559

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1559] was unlabeled:
#1559

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1559] was labeled:
#1559

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1559] was merged:
#1559

[doctrinebot]

Issue was closed with resolution "Fixed"