Refactor and improvements for method com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.createVMFromSpec() (#5149)

* Refactor method createVMFromSpec

* Add unit tests

* Fix test

* Extract if block to method for add extra configs to VM Domain XML

* Split travis tests trying to isolate which test is causing an error

* Override toString() method

* Update documentation

* Fix checkstyle error (line with trailing spaces)

* Change VirtualMachineTO print of object

* Add try except to find message error. Remove after test

* Fix indent

* Trying to understanding why is happening in this code

* Refactor method createVMFromSpec

* Add unit tests

* Fix test

* Extract if block to method for add extra configs to VM Domain XML

* Split travis tests trying to isolate which test is causing an error

* Override toString() method

* Update documentation

* Fix checkstyle error (line with trailing spaces)

* Remove unnecessary comment

* Revert travis tests

Co-authored-by: SadiJr <17a0db2854@firemailbox.club>

Author: SadiJr

api/src/main/java/com/cloud/agent/api/to/VirtualMachineTO.java

@@ -413,4 +413,9 @@ public DeployAsIsInfoTO getDeployAsIsInfo() {
     public void setDeployAsIsInfo(DeployAsIsInfoTO deployAsIsInfo) {
         this.deployAsIsInfo = deployAsIsInfo;
     }
+
+    @Override
+    public String toString() {
+        return String.format("VM {id: \"%s\", name: \"%s\", uuid: \"%s\", type: \"%s\"}", id, name, uuid, type);
+    }
 }