[TASK] Test for PHP 5.6 for LTS (master) with travis

Moved 5.5 to all builds because TYPO3 supports officially PHP 5.5 in TYPO3 6.0

.travis.yml

@@ -3,6 +3,7 @@ language: php
 php:
   - 5.3
   - 5.4
+  - 5.5
 
 env:
   - DB=mysql TYPO3=master INTEGRATION=master
@@ -11,7 +12,7 @@ env:
 matrix:
    fast_finish: true
    include:
-     - php: 5.5
+     - php: 5.6
        env: DB=mysql TYPO3=master INTEGRATION=master
 
 before_script:
@@ -55,4 +56,4 @@ script:
 # PHPCodeSniffer code inspection with only errors displayed (no warnings)
   - build-environment/CodeSniffer/scripts/phpcs -n --standard=$PWD/build-environment/FluidTYPO3-CodingStandards/ruleset.xml $PWD/typo3conf/ext/fluidpages
 # PHPUnit tests from overridden phpunit tests configuration file
-  - if [[ -f typo3conf/ext/fluidpages/Tests/phpunit.xml ]]; then typo3/cli_dispatch.phpsh phpunit -c phpunit.xml; fi
+  - if [[ -f typo3conf/ext/fluidpages/Tests/phpunit.xml ]]; then typo3/cli_dispatch.phpsh phpunit -c phpunit.xml; fi