Improve Docs in regards of OpenSessionInViewFilter. [DATAGRAPH-1294]

[spring-projects-issues]

Michael Simons opened DATAGRAPH-1294 and commented

The current appendix reads as if the OpenSessionInViewFilter is a required thing to do in a web application. As OSIV will cause problems in a cluster setup (See https://info.michael-simons.eu/2020/02/03/spring-data-neo4j-neo4j-ogm-and-osiv/ and spring-projects/spring-boot#20012), we should remove that stance completely from the docs

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Affects: 5.1.15 (Lovelace SR15), 5.2.4 (Moore SR4), 5.3 M3 (Neumann)

Backported to: 5.2.5 (Moore SR5), 5.1.16 (Lovelace SR16)