Create pseudo subjectId for operations

[peterjohnlawrence]

1: Create a pseudo subjectId of the form using the key fields of an operation entity

subjectid = prod='NWD~Product-58',order='NWD~Order-10863'

compared with normal subjectid for a standard entity

subjectdId = NWD~Product-58

2: Also declare this as the actual primary key of an operation entity

3: Change the subjecId for normal entities from string to quoted string:

NWD~Product-58 -> 'NWD~Product-58'

This will allow unambiguous use of the primary key within OpenUI5, OData and SPARQL

[peterjohnlawrence]

Fixed