Temporarily deactivate all processing providers/algorithms

While the processing API is in such a state of flux it's
become unmaintainable to port these algorithms change-by-change.
Instead, disable them all until the API is fixed, and then we
can port them algorithm by algorithm and reactivate each
test in turn.

python/plugins/processing/core/Processing.py

@@ -52,12 +52,12 @@
 from processing.tools import dataobjects
 
 from processing.modeler.ModelerAlgorithmProvider import ModelerAlgorithmProvider  # NOQA
-from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider  # NOQA
-from processing.algs.grass7.Grass7AlgorithmProvider import Grass7AlgorithmProvider  # NOQA
-from processing.algs.gdal.GdalAlgorithmProvider import GdalAlgorithmProvider  # NOQA
-from processing.algs.saga.SagaAlgorithmProvider import SagaAlgorithmProvider  # NOQA
-from processing.script.ScriptAlgorithmProvider import ScriptAlgorithmProvider  # NOQA
-from processing.preconfigured.PreconfiguredAlgorithmProvider import PreconfiguredAlgorithmProvider  # NOQA
+#from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider  # NOQA
+#from processing.algs.grass7.Grass7AlgorithmProvider import Grass7AlgorithmProvider  # NOQA
+#from processing.algs.gdal.GdalAlgorithmProvider import GdalAlgorithmProvider  # NOQA
+#from processing.algs.saga.SagaAlgorithmProvider import SagaAlgorithmProvider  # NOQA
+#from processing.script.ScriptAlgorithmProvider import ScriptAlgorithmProvider  # NOQA
+#from processing.preconfigured.PreconfiguredAlgorithmProvider import PreconfiguredAlgorithmProvider  # NOQA
 
 
 class Processing(object):

python/plugins/processing/tests/AlgorithmsTestBase.py

@@ -83,8 +83,9 @@ def test_algorithms(self):
         with open(os.path.join(processingTestDataPath(), self.test_definition_file()), 'r') as stream:
             algorithm_tests = yaml.load(stream)
 
-        for algtest in algorithm_tests['tests']:
-            yield self.check_algorithm, algtest['name'], algtest
+        if 'tests' in algorithm_tests and algorithm_tests['tests'] is not None:
+            for algtest in algorithm_tests['tests']:
+                yield self.check_algorithm, algtest['name'], algtest
 
     def check_algorithm(self, name, defs):
         """