Adjust requirements files for pip-dump smooth usage

requirements/.pipignore

@@ -0,0 +1,10 @@
+beautifulsoup4
+cov-core
+cssselect
+django-appconf
+lxml
+py
+python-ldap
+sqlparse
+waitress
+WebOb

requirements/dev-requirements.txt

@@ -1,5 +1,4 @@
 -r test-requirements.txt
-
 django-debug-toolbar==1.2.1
 ipdb==0.8
 ipython==2.3.0

requirements/test-requirements.txt

@@ -1,11 +1,10 @@
 -r requirements.txt
-
 coverage==3.7.1
 django-dynamic-fixture==1.7.0
 django-webtest==1.7.7
 pyPdf==1.13
 pyquery==1.2.9
-pytest==2.6.4
 pytest-cov==1.8.0
 pytest-django==2.7.0
+pytest==2.6.4
 WebTest==2.0.16