Support context aware report controller views

[ramonski]

Description of the issue/feature this PR addresses

At the moment the report controller view is a multi-adapter for model/collection and the request.
The rendering context within the view (self.context) is hard coded to the portal object.

This PR allows to register a context aware multi-adapter for the current rendering context, the model/collection and the request.

The registration in configure.zcml can be done like this:

  <!-- View for Single Reports -->
  <adapter
      for="*
           *
           my.lims.interfaces.IMyLIMS"
      name="AnalysisRequest"
      factory=".reportview.MySingleReportView"
      provides="senaite.impress.interfaces.IReportView"
      permission="zope2.View"/>

  <!-- View for Multi Reports -->
  <adapter
      for="*
           *
           my.lims.interfaces.IMyLIMSLayer"
      name="AnalysisRequest"
      factory=".reportview.MyMultiReportView"
      provides="senaite.impress.interfaces.IMultiReportView"
      permission="zope2.View"/>

With this corresponding report controller view implementation:

from senaite.impress.analysisrequest.reportview import MultiReportView

class MyMultiReportView(MultiReportView):
    """My specific controller view for multi-reports
    """

    def __init__(self, context, collection, request):
        logger.info("MyMultiReportView::__init__:collection={}"
                    .format(collection))
        super(MultiReportView, self).__init__(collection, request)
        self.collection = collection
        self.context = context
        self.request = request

Any context aware multi-adapter takes precedence over the multi-adapters that only adapt the model/controller and the request

Current behavior before PR

No context aware report controller views supported

Desired behavior after PR is merged

Context aware report controller views supported

--
I confirm I have tested this PR thoroughly and coded it according to PEP8
and Plone's Python styleguide standards.