[JCLOUDS-702] JCloud ProfitBricks provider implementation

Hi! This implements most of ProfitBrick's API. I look forward for your comments, suggestions, and revisions.
ok, so I assume profitbricks doesn't have a password like that :)

what you want to do in order to have tests use a well known property is add the property to your pom
    <test.profitbricks.template>imageId=your_image_id,loginUser=root:apachejcrauds</test.profitbricks.template>

Make sure you propagate that in the surefire systemPropertyVariables

Syntax is here! https://github.com/jclouds/jclouds/blob/master/compute/src/test/java/org/jclouds/compute/domain/TemplateBuilderSpecTest.java#L541

cc @demobox @andreaturli  (just to share this info)