RAM and CPU were switched over in Host constructor

src/main/java/org/fogbowcloud/green/server/core/greenStrategy/DefaultGreenStrategy.java

@@ -182,6 +182,10 @@ public class DefaultGreenStrategy implements GreenStrategy {
 
 	public void wakeUpSleepingHost(int minCPU, int minRAM) {
 		Host host = this.sleepingHosts.peek();
+		if (host == null) { 
+			LOGGER.info("There is no host sleeping at the moment.");
+			return;
+		}
 		try {
 			if (host.getAvailableCPU() < minCPU) {
 				LOGGER.info("Tried to wake hosts but no hosts were found");

src/main/java/org/fogbowcloud/green/server/core/plugins/openstack/OpenStackInfoPlugin.java

@@ -141,8 +141,8 @@ public class OpenStackInfoPlugin implements CloudInfoPlugin {
 				int availableRamInTheHost = availableRam.get(hostName);
 				int availableCPUInTheHost = availableCPU.get(hostName);
 				Host host = new Host(name, runningVMInTheHost, novaEnable,
-						novaRunning, updateTime, availableRamInTheHost,
-						availableCPUInTheHost);
+						novaRunning, updateTime, availableCPUInTheHost, 
+						availableRamInTheHost);
 				hosts.add(host);
 			} catch (Exception e) {
 				// Ignoring exceptions for hosts in unavailable zones