Fixed host and servicedetails show only one contact under the "Relations" Tab

Caused by a weird Doctrine problem where the first column must
be the primary key.

After changing that it works.

A hell to debug -.-

(fixes #4222)
Fixed problem with Oracle schema for 1.9.0 - identifier too long

Just updated 1.9.0 schema, not issuing one for 1.9.1.

(fixes #4157)
Changelog and version update for v1.9.1