Revert "CLOUDSTACK-7130: Adding BugId to failed test cases"

This reverts commit 24da72f37395a6bb612ea1d073db0155289cf000.
Changed delete method signature inside VirtualMachine class. From 4.3 onwards vm destroy has expunge parameter to expunge the vm immediately.

Signed-off-by: sanjeev <sanjeev@apache.org>
Signed-off-by: Santhosh Edukulla <santhosh.edukulla@gmail.com>
CLOUDSTACK-7150. [VMware] Global config 'vm.instancename' is not honored.
If global config 'vm.instancename' is set to true, VM name in vCenter should be '<instance_name>-<vm_hostname>'.
CLOUDSTACK-7152. Attaching datadisk to VMs that have VM snapshot throws 'Unexpected exception'.
Like with other API commands, ensure input parameter validation for AttachVolume happens outside the job queue.
Fix string encoding problem reported by coverity
Remove dead code
Fix equality check using != on objects

Cleanup in the code, removing dead code