Replace Vagrant VM with Docker containers

[fabiang]

closes #209

[ZVanoZ]

# Go to "laminas-db" sources
$ cd laminas-db

# Config for all tests. Copy "phpunit.xml.dist" to "phpunit.xml" in directory "laminas-db".
$ cp phpunit.xml.dist phpunit.xml

# Config for check and fix code-style, create "phpcs.xml"  
$ cp phpcs.xml.dist phpcs.xml

# Update libraries
$ docker run --rm -it --volume $(pwd):/app zvanoz/laminas-db-test-by-docker:74 composer update

# Check code, using rules laminas comunity.
$ docker run --rm -it --volume $(pwd):/app zvanoz/laminas-db-test-by-docker:74 composer cs-check -vvv

# Auto-fix code, using rules laminas comunity.
$ docker run --rm -it --volume $(pwd):/app zvanoz/laminas-db-test-by-docker:74 composer cs-fix -vvv