Use centralised test scripts

This patch consumes the test scripts implemented by
https://review.openstack.org/375061 to ensure that
the tests and test preparation is consistent and
more maintainable.

Change-Id: Ic24df14a7011dac134059cf32a3952c948af60dc

tox.ini

@@ -22,11 +22,9 @@ passenv =
     NO_PROXY
 whitelist_externals =
     bash
-    git
-    rm
-    wget
 setenv =
     VIRTUAL_ENV={envdir}
+    WORKING_DIR={toxinidir}
 
 
 [testenv:docs]
@@ -52,17 +50,17 @@ commands =
     {posargs}
 
 
+[testenv:tests_clone]
+commands =
+    bash -c "if [ ! -d "{toxinidir}/tests/common" ]; then \
+               git clone https://git.openstack.org/openstack/openstack-ansible-tests {toxinidir}/tests/common; \
+             fi"
+
+
 [testenv:pep8]
 commands =
-    # Run hacking/flake8 check for all python files
-    bash -c "grep --recursive --binary-files=without-match \
-        --files-with-match '^.!.*python$' \
-        --exclude-dir .eggs \
-        --exclude-dir .git \
-        --exclude-dir .tox \
-        --exclude-dir *.egg-info \
-        --exclude-dir doc \
-        {toxinidir} | xargs flake8 --verbose"
+    {[testenv:tests_clone]commands}
+    bash -c "{toxinidir}/tests/common/test-pep8.sh"
 
 
 [flake8]
@@ -75,19 +73,8 @@ ignore=F403,H303
 
 [testenv:bashate]
 commands =
-    # Run bashate check for all bash scripts
-    # Ignores the following rules:
-    #     E003: Indent not multiple of 4 (we prefer to use multiples of 2)
-    #     E006: Line longer than 79 columns (as many scripts use jinja
-    #           templating, this is very difficult)
-    #     E040: Syntax error determined using `bash -n` (as many scripts
-    #           use jinja templating, this will often fail and the syntax
-    #           error will be discovered in execution anyway)
-    bash -c "grep --recursive --binary-files=without-match \
-        --files-with-match '^.!.*\(ba\)\?sh$' \
-        --exclude-dir .tox \
-        --exclude-dir .git \
-        {toxinidir} | xargs bashate --error . --verbose --ignore=E003,E006,E040"
+    {[testenv:tests_clone]commands}
+    bash -c "{toxinidir}/tests/common/test-bashate.sh"
 
 
 [testenv:linters]