Readd travis

.travis.yml

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+language: php
+sudo: required
+
+services:
+  - mysql
+
+before_script:
+  - phpenv config-rm xdebug.ini || true
+  - ./tests/LDAP/ldap_run.sh
+  - composer self-update
+  - rm -f composer.lock
+  - composer config --unset platform
+  - nvm install --lts=dubnium # update node to dubnium LTS version (node v10.x + npm v6.9.0)
+  - bin/console dependencies install --composer-options="--prefer-dist --no-progress"
+  - mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root mysql
+  - mysql -u root -e 'create database glpitest;'
+  - bin/console glpi:database:install --config-dir=./tests --no-interaction --db-name=glpitest --db-user=root
+  - ./tests/LDAP/ldap_fixtures.sh > /dev/null
+
+script:
+  - mysql -u root -e 'select version();'
+  - composer testldap
+
+matrix:
+  include:
+    - php: 7.2
+      dist: xenial
+      addons:
+        apt:
+          packages:
+            - ldap-utils
+            - slapd
+        hosts:
+          - openldap
+    - php: 7.4
+      dist: bionic
+      addons:
+        apt:
+          packages:
+            - ldap-utils
+            - slapd
+        hosts:
+          - openldap
+    - php: nightly
+      dist: bionic
+      addons:
+        apt:
+          packages:
+            - ldap-utils
+            - slapd
+        hosts:
+          - openldap
+  allow_failures:
+    - php: nightly
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+    - $HOME/.npm/_cacache
+
+#exclude old branches, without tests
+branches:
+  except:
+    - /^0\..*$/