feat(CI): improve Travis configuration (#1486)

- use random DB names in order to detect statements which address a specific DB
- split compilation and DB check (DB check and dry run only have to run once)
- use separate shell scripts for easier module Travis integration

apps/ci/ci-script.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+echo "compile core"
+export CCACHE_CPP2=true
+ccache -s
+timeout 2580 bash ./acore.sh "compiler" "all"
+ccache -s
+
+if [ "$TRAVIS_BUILD_ID" = "1" ]
+then
+  echo "start worldserver dry-run"
+  git clone --depth=1 --branch=master --single-branch https://github.com/ac-data/ac-data.git /home/travis/build/azerothcore/azerothcore-wotlk/env/dist/data
+  sed -e "s/;;acore_auth/;$DB_RND_NAME;auth_$DB_RND_NAME/" -e "s/;;acore_world/;$DB_RND_NAME;world_$DB_RND_NAME/" -e "s/;;acore_characters/;$DB_RND_NAME;characters_$DB_RND_NAME/" ./data/travis/worldserver.conf >./env/dist/etc/worldserver.conf
+  ./env/dist/bin/worldserver --dry-run
+  ./apps/ci/ci-error-check.sh
+fi