add test testSelectOneToOneDisjunction

[bkempe]

Test showing failure of join table in select, OneToOne and disjunction query

[rbygrave]

Background:

• This issue was introduced in 12.9.0 Null check for soft-deleteable one-to-one exported assoc has extraneous soft-delete predicate #2230
• Null check for soft-deleteable one-to-one exported assoc has extraneous soft-delete predicate #2230 Was added to fix SoftDelete predicate missing on join to ManyToOne supporting predicate expression #2145