Add ServicePlanAddon

BUGFIX EXTREST-143 Fix incorrect line formatting

BUGFIX EXTREST-137 simpleXml fix for & in values.

Merge pull request plesk#109 from plesk/bugfix-vdiomidov-simplexml-am…

…prsant-fix-ppp-54497

BUGFIX EXTREST-137 simpleXml fix for & in values

Merge pull request plesk#102 from vizovitin/new-plesk-image-with-real…

…-systemd

Switch to new Plesk image for tests in docker

Merge pull request plesk#102 from vizovitin/new-plesk-image-with-real…

…-systemd

Switch to new Plesk image for tests in docker

Merge pull request plesk#87 from ova777/master

New SecretKeys response format support

Wait for Plesk initialization before tests execution

Getting disk usage details (plesk#54)

Getting disk usage details functionality added