Add test_data to flake8, fixing current issues

Change-Id: I25bae588edfe075ba0437a24584c9a14894e1f27

test_data/powertrain_build/test_nvm_def/nvm_def_setup.py

@@ -22,8 +22,7 @@ nvm_vars_test = {
     'sVcAesHw_X_VntAdpnOffs': {
         'VcAesVnt': {
             'class': 'CVC_DISP_NVM',
-            'configs': ['Vc_Aes_Vnt_B_CodeGenVntGvnr '
-                        '== 0'],
+            'configs': ['Vc_Aes_Vnt_B_CodeGenVntGvnr == 0'],
             'description': 'Enter a nice '
                            'description of your '
                            'variable here',

test_data/zone_controller/test_composition_yaml/prepare_for_xml.py

@@ -4,8 +4,13 @@
 """Unit test data for powertrain_build.zone_controller.composition_yaml."""
 
 description = "This is a valid description."
-illegal_description = "This is a description with 'single' and \"double\" quotes & some <illegal> XML characters."
-fixed_illegal_description = "This is a description with &apos;single&apos; and &quot;double&quot; quotes &amp; some &lt;illegal&gt; XML characters."
+illegal_description = (
+    "This is a description with illegal XML characters: 'single' and \"double\" quotes as well as < & >."
+)
+fixed_illegal_description = (
+    "This is a description with illegal XML characters: "
+    "&apos;single&apos; and &quot;double&quot; quotes as well as &lt; &amp; &gt;."
+)
 long_description = (
     "This is a long description that spans multiple lines. \n"
     "It does not contain any single and double quotes or any other illegal XML characters. \n"

tox.ini

@@ -23,7 +23,7 @@ deps =
     -rtest-requirements.txt
 
 [testenv:flake8]
-commands = flake8 powertrain_build tests
+commands = flake8 powertrain_build tests test_data
 
 [testenv:pytest]
 commands =