Add a security scanner api config object for params

Change SecScanAPI to use a uri creation func instead of test context

Pass config provider through validator context

Remove app config dependency for validators

util/config/provider/basefileprovider.py

@@ -68,3 +68,7 @@ class BaseFileProvider(BaseProvider):
         return True
 
     return False
+
+  def get_config_root(self):
+    return self.config_volume
+

util/config/provider/baseprovider.py

@@ -123,3 +123,8 @@ class BaseProvider(object):
   def get_volume_path(self, directory, filename):
     """ Helper for constructing relative file paths, which may differ between providers.
         For example, kubernetes can't have subfolders in configmaps """
+
+  @abstractmethod
+  def get_config_root(self):
+    """ Returns the config root directory. """
+

util/config/provider/testprovider.py

@@ -10,6 +10,11 @@ REAL_FILES = ['test/data/signing-private.gpg', 'test/data/signing-public.gpg', '
 class TestConfigProvider(BaseProvider):
   """ Implementation of the config provider for testing. Everything is kept in-memory instead on
       the real file system. """
+
+  def get_config_root(self):
+    raise Exception('Test Config does not have a config root')
+    # return ''
+
   def __init__(self):
     self.clear()