[FIX] packaging: adapt test environment to less dependency

setup/package.dfcentos

@@ -9,6 +9,8 @@ RUN yum install -d 0 -e 0 epel-release -y && \
 	yum install -d 0 -e 0 \
 		babel \
 		libxslt-python \
+		nodejs-less \
+		nodejs-clean-css \
 		pychart \
 		pyparsing \
 		python-dateutil \

setup/package.dfdebian

@@ -17,6 +17,8 @@ RUN apt-get update -qq &&  \
 	apt-get upgrade -qq -y && \
 	apt-get install \
 		adduser \
+		node-less \
+		node-clean-css \
 		postgresql \
 		postgresql-client \
 		python \

setup/package.dfsrc

@@ -20,6 +20,8 @@ RUN apt-get update -qq &&  \
 		postgresql-server-dev-all \
 		postgresql-client \
 		adduser \
+		node-less \
+		node-clean-css \
 		libxml2-dev \
 		libxslt1-dev \
 		libldap2-dev \