Requisition initiate screen makes additional call to retrieve requisition representation

Requisition initiate screen retrieves the requisition twice (first time with POST /initiate and second time with GET /id, what considerably raises the time it takes between clicking the proceed button and seeing the requisition grid screen.

Acceptance criteria:

• Initiating requisition makes only one call - POST /initiate and uses the response from that call

• The requisition workflow works properly after the changes

• Accessing already initiated requisitions from the same screen retrieves the requisition properly

Also see https://openlmis.atlassian.net/browse/OLMIS-3322#icft=OLMIS-3322 for reference