Merge pull request #12 from xingzhou/volumn_apis

Add ability to create/cancel iSCSI SAN storage volume
resolved merged conflicts with PR #12
added implementation of SLVGBDTG#getStatus
added missing parameters to SLVGBDTG data type
added unit tests for SLVGBDTG service
refactored methods into test_helpers
added integration tests for SLVGBDTG
correctly name SoftLayer_Security_Ssh_Key_Service
added StrickHostChecking=no option to ssh calls
added implementation for VG#<rebootSoft|rebootHard>
added integration tests for VG#<rebootSoft|rebootHard>
added ability to specify multiple raw HTTP response data for SL fake client
rename test fixtures ...setUserMetadata.json to correct ...setMetadata.json
Add getIscsiVolume method

Will fetch the iSCSI volume object based on volume id.