(MODULES-2605) Use MYSQL_PWD to avoid mysqldump warnings.
(MODULES-2605) Use MYSQL_PWD to avoid mysqldump warnings.

Instead of using password as a command arguments, we are setting MYSQL_ENV variable. See https://dev.mysql.com/doc/refman/5.1/en/password-security-user.html

breuninger-ecom/puppetlabs-mysql,breuninger-ecom/puppetlabs-mysql,skyscrapers/puppetlabs-mysql,jbondpdx/puppetlabs-mysql,ndelic0/puppetlabs-mysql,markasammut/puppetlabs-mysql,Adaptavist/puppet-mysql,fuel-infra/puppetlabs-mysql,ndelic0/puppetlabs-mysql,DavidS/puppetlabs-mysql,squarit/puppetlabs-mysql,plumgrid/puppetlabs-mysql,plumgrid/puppetlabs-mysql,igalic/puppetlabs-mysql,hundredacres/puppetlabs-mysql,rdo-puppet-modules/puppetlabs-mysql,breuninger-ecom/puppetlabs-mysql,skyscrapers/puppetlabs-mysql,simp/puppetlabs-mysql,edestecd/puppetlabs-mysql,jbondpdx/puppetlabs-mysql,DavidS/puppetlabs-mysql,apa-it/puppetlabs-mysql,bmjen/puppetlabs-mysql,edestecd/puppetlabs-mysql,puppetlabs/puppetlabs-mysql,markasammut/puppetlabs-mysql,hundredacres/puppetlabs-mysql,fuel-infra/puppetlabs-mysql,apa-it/puppetlabs-mysql,Adaptavist/puppet-mysql,rdo-puppet-modules/puppetlabs-mysql,squarit/puppetlabs-mysql,bmjen/puppetlabs-mysql,igalic/puppetlabs-mysql,puppetlabs/puppetlabs-mysql,simp/puppetlabs-mysql