Add PasswordCredentialsObject class

Class needed to model GetTokenRequest

com.rcarrillocruz.android.openstackdroid/src/com/rcarrillocruz/android/openstackdroid/PasswordCredentialsObject.java

@@ -0,0 +1,28 @@
+package com.rcarrillocruz.android.openstackdroid;
+
+public class PasswordCredentialsObject {
+	private String username;
+	private String password;
+	
+	public PasswordCredentialsObject(String username, String password) {
+		super();
+		this.username = username;
+		this.password = password;
+	}
+
+	public String getUsername() {
+		return username;
+	}
+
+	public void setUsername(String username) {
+		this.username = username;
+	}
+
+	public String getPassword() {
+		return password;
+	}
+
+	public void setPassword(String password) {
+		this.password = password;
+	}
+}