Travis CI: update to the latest version of .travis.yml

* Switch to PackPack for packages
* Use `packagecloud` deployment instead of travis.sh script
* Enable email notifications
* Add Fedora 25, Ubuntu Yakkety
* Remove Ubuntu Wily (EOL)

Author: rtsisyk

.travis.yml

@@ -1,37 +1,76 @@
-sudo: required
+sudo: false
+language: C
 services:
   - docker
 
-language: c
-compiler: gcc
+cache:
+    directories:
+      - $HOME/.cache
 
 env:
-  global:
-    - PRODUCT=tarantool-mqtt
-  matrix:
-    - PACK=none
-    - OS=el DIST=7 PACK=rpm
-    - OS=fedora DIST=23 PACK=rpm
-    - OS=fedora DIST=24 PACK=rpm
-    - OS=ubuntu DIST=wily PACK=deb
-    - OS=ubuntu DIST=xenial PACK=deb
-    - OS=debian DIST=jessie PACK=deb
-
-matrix:
-  allow_failures:
-    - env: OS=el DIST=7 PACK=rpm
-    - env: OS=fedora DIST=23 PACK=rpm
-    - env: OS=fedora DIST=24 PACK=rpm
-    - env: OS=ubuntu DIST=wily PACK=deb
-    - env: OS=ubuntu DIST=xenial PACK=deb
-    - env: OS=debian DIST=jessie PACK=deb
+    global:
+      - PRODUCT=tarantool-mqtt
+    matrix:
+#      - OS=el DIST=6
+      - OS=el DIST=7
+      - OS=fedora DIST=24
+      - OS=fedora DIST=25
+#      - OS=ubuntu DIST=precise
+#      - OS=ubuntu DIST=trusty
+      - OS=ubuntu DIST=xenial
+      - OS=ubuntu DIST=yakkety
+#      - OS=debian DIST=wheezy
+      - OS=debian DIST=jessie
+      - OS=debian DIST=stretch
 
+#matrix:
+#    allow_failures:
+#      - env: OS=el DIST=6
+#      - env: OS=el DIST=7
+#      - env: OS=fedora DIST=24
+#      - env: OS=fedora DIST=25
+#      - env: OS=ubuntu DIST=precise
+#      - env: OS=ubuntu DIST=trusty
+#      - env: OS=ubuntu DIST=xenial
+#      - env: OS=ubuntu DIST=yakkety
+#      - env: OS=debian DIST=wheezy
+#      - env: OS=debian DIST=jessie
+#      - env: OS=debian DIST=stretch
 
 script:
-  - git clone https://github.com/tarantool/build.git
-  - PACKAGECLOUD_REPO=tarantool/1_6 REPO_PREFIX=1.6 ./build/pack/travis.sh
-  - PACKAGECLOUD_REPO=tarantool/1_7 REPO_PREFIX=1.7 ./build/pack/travis.sh
+  - git describe --long
+  - git clone https://github.com/packpack/packpack.git packpack
+  - packpack/packpack
+
+before_deploy:
+  - ls -l build/
+
+deploy:
+  # Deploy packages to PackageCloud
+  - provider: packagecloud
+    username: tarantool
+    repository: "1_6"
+    token: ${PACKAGECLOUD_TOKEN}
+    dist: ${OS}/${DIST}
+    package_glob: build/*.{rpm,deb,dsc}
+    skip_cleanup: true
+    on:
+      branch: master
+      condition: -n "${OS}" && -n "${DIST}" && -n "${PACKAGECLOUD_TOKEN}"
+  - provider: packagecloud
+    username: tarantool
+    repository: "1_7"
+    token: ${PACKAGECLOUD_TOKEN}
+    dist: ${OS}/${DIST}
+    package_glob: build/*.{rpm,deb,dsc}
+    skip_cleanup: true
+    on:
+      branch: master
+      condition: -n "${OS}" && -n "${DIST}" && -n "${PACKAGECLOUD_TOKEN}"
 
 notifications:
-  email: true
-  irc: false
+  email:
+    recipients:
+      - build@tarantool.org
+    on_success: change
+    on_failure: always