Python: import all frameworks

Are there any frameworks we do _not_ want here?

Author: yoff

python/ql/lib/semmle/python/security/dataflow/SqlInjectionCustomizations.qll

@@ -9,7 +9,7 @@ private import semmle.python.dataflow.new.DataFlow
 private import semmle.python.Concepts
 private import semmle.python.dataflow.new.RemoteFlowSources
 private import semmle.python.dataflow.new.BarrierGuards
-private import semmle.python.frameworks.SqlAlchemy
+private import semmle.python.Frameworks
 
 /**
  * Provides default sources, sinks and sanitizers for detecting