ansible: deprecated syntax for apt

[strk]

Warning message:

Invoking "apt" only once while using a loop via squash_actions is deprecated. Instead of using a loop to supply multiple items and specifying `name: "{{ item }}"`, 
please use `name: ['vim', 'git', 'build-essential', 'qt5-qmake', 'libboost-system-dev', 'libboost-thread-dev', 'libboost-serialization-dev']` and remove the loop. This feature will be 
removed from ansible-base in version 2.11.