travis-ci: Make use of before_script target

.travis.yml

@@ -6,6 +6,8 @@ before_install:
 install:
     - sudo apt-get install -qq --no-install-recommends perl autotools-dev libdbi-dev libldap2-dev libpq-dev libmysqlclient-dev libradiusclient-ng-dev libkrb5-dev libnet-snmp-perl procps mawk
     - sudo apt-get install -qq --no-install-recommends autoconf automake
+
+before_script:
     - tools/setup
     - ./configure