[trivial] Rename tox jobs for zuul

This patchset renames the tox.ini jobs:

* coverage => cover
* lint => pep8
* unit => py35

to comply with OpenStack standards [0].

[0] e.g. 04469a5181/tox.ini (L119)

Change-Id: I1a542c5e36f29d3788df8a5ebdce3cbe49ab4046

Makefile

@@ -36,11 +36,11 @@ docs:
 
 .PHONY: tests-unit
 tests-unit:
-	tox -e unit
+	tox -e py35
 
 .PHONY: tests-pep8
 tests-pep8:
-	tox -e lint
+	tox -e pep8
 
 chartbanner:
 	@echo Building charts: $(CHARTS)

tools/zuul/playbooks/zuul-linter.yaml

@@ -15,6 +15,6 @@
 - hosts: primary
   tasks:
     - name: Execute a Whitespace Linter check
-      command: find . -not -path "*/\.*" -not -path "*/docs/build/*" -not -name "*.tgz"  -type f -exec egrep -l " +$" {} \;
+      command: find . -not -path "*/\.*" -not -path "*/doc/build/*" -not -name "*.tgz"  -type f -exec egrep -l " +$" {} \;
       register: result
       failed_when: result.stdout != ""

tox.ini

@@ -1,10 +1,10 @@
 [tox]
-envlist = lint,unit,bandit,docs
+envlist = pep8,py35,bandit,docs
 
 [testenv]
 basepython=python3
 
-[testenv:unit]
+[testenv:py35]
 setenv =
   PYTHONWARNING=all
 deps = -r{toxinidir}/requirements-frozen.txt
@@ -48,7 +48,7 @@ whitelist_externals = sh
 commands =
     {toxinidir}/tools/lint_gate.sh
 
-[testenv:lint]
+[testenv:pep8]
 deps =
     yapf==0.20.0
     flake8==3.5.0