Add pylint to Makefile & fix pylintrc

Makefile

@@ -8,6 +8,10 @@ all: prepare test
 prepare:
 	pip install -r requirements_test.txt
 
+.PHONY: pylint
+pylint:
+	pylint ocw/lib/*.py cleanup_k8s.py
+
 .PHONY: test
 test:
 	flake8 --max-line-length=130 webui

pylintrc

@@ -1,5 +1,6 @@
 [MASTER]
 disable=
+ C0103, # Module name "EC2" doesn't conform to snake_case naming style
  C0114, # missing-module-docstring
  C0115, # missing-class-docstring 
  C0116, # missing-function-docstring
@@ -8,10 +9,14 @@ disable=
  C0415, # Import outside toplevel
  E1101, # no-member
  R0904, # Too many public methods
+ R0912, # Too many branches
  R1702, # Too many nested blocks
  W0201, # Attribute %r defined outside __init__
+ W0221, # arguments-differ
  W0237, # arguments-renamed
+ W0602, # Using global for 'FOOBAR' but no assignment is done
  W0603, # Using the global statement
+ W0613, # Unused argument 'args'
  W0703, # broad-except
  W0719, # broad-exception-raised