travis: move pylint into style checks stage

.travis.yml

@@ -6,10 +6,17 @@ language: c
 jobs:
   include:
     - stage: 'style checks'
+      name: 'python format'
       language: 'python'
       python: '3.6'
       install: pip install --upgrade black
       script: ./scripts/check-format
+    - stage: 'style checks'
+      name: 'python lint'
+      language: 'python'
+      python: '3.6'
+      install: pip install --upgrade pylint
+      script: pylint --rcfile=src/bindings/python/.pylintrc src/bindings/python/flux
     - name: "Ubuntu: no configure flags"
       stage: test
       compiler: gcc
@@ -30,14 +37,14 @@ jobs:
        - ARGS="--with-flux-security --enable-caliper"
        - DISTCHECK=t
        - PYTHON_VERSION=2.7
-    - name: "Ubuntu: clang-6.0 chain-lint --with-flux-security --enable-pylint"
+    - name: "Ubuntu: clang-6.0 chain-lint --with-flux-security"
       stage: test
       compiler: clang-6.0
       env:
        - CC=clang-6.0
        - CXX=clang++-6.0
        - chain_lint=t
-       - ARGS="--with-flux-security --enable-pylint"
+       - ARGS="--with-flux-security"
        - PYTHON_VERSION=2.7
     - name: "Ubuntu: COVERAGE=t, --with-flux-security --enable-caliper"
       stage: test