SOL002_28: filters implemented for Subscriptions GET

        The GET method queries the list of active subscriptions of the

        functional block that invokes the method. It can be used e.g. for

        resynchronization after error situations.

      parameters:

        - name: filter

          description: >

            Attribute-based filtering expression according to clause 4.3.2.

            The VNFM shall support receiving this parameter as part of the URI query string.

            The EM may supply this parameter. All attribute names that appear in the LccnSubscription

            and in data types referenced from it shall be supported by the VNFM in the filter expression.

            EXAMPLE

            objects

            obj1: {"id":123, "weight":100, "parts":[{"id":1, "color":"red"}, {"id":2, "color":"green"}]}

            obj2: {"id":456, "weight":500, "parts":[{"id":3, "color":"green"}, {"id":4, "color":"blue"}]}

            Request 1:

            GET …/container

            Response 1:

            [

                {"id":123, "weight":100, "parts":[{"id":1, "color":"red"}, {"id":2, "color":"green"}]},

                {"id":456, "weight":500, "parts":[{"id":3, "color":"green"}, {"id":4, "color":"blue"}]}

            ]

            Request 2:

            GET …/container?filter=(eq.weight,100)

            Response 2:

            [

                {"id":123, "weight":100, "parts":[{"id":1, "color":"red"}, {"id":2, "color":"green"}]}

            ]

          #Request 2 in EXAMPLE from clause 4.3.2 probably wrong, since "," should be used after opOne (eq), "." is used

          in: query

          required: false

          type: string

      responses:

        200:

          description: >