Rename as Cloud.java

Signed-off-by: huangdada <huangdada@huangdada-PC>
Rename CloudElement.java To Cloud.java

Signed-off-by: huangdada <huangdada@huangdada-PC>
add VM related functions.like create, terminate, suspend, start, list

Signed-off-by: huangdada <huangdada@huangdada-PC>

Modified to adapt the new structure after seperating the cloud plugin
codes
Signed-off-by: huangdada <huangdada@huangdada-PC>

added an initialization of vmman
Signed-off-by: huangdada <huangdada@huangdada-PC>


Signed-off-by: huangdada <huangdada@huangdada-PC>
Changed the peremeters of functions

Signed-off-by: huangdada <huangdada@huangdada-PC>


Signed-off-by: huangdada <huangdada@huangdada-PC>