Added classes to support the definition of hardware constraints.

src/main/java/org/hobbit/core/data/HardwareConstraints.java

@@ -0,0 +1,57 @@
+package org.hobbit.core.data;
+
+public class HardwareConstraints {
+
+    protected String iri;
+    protected String label;
+    protected long ram;
+    protected int cpus;
+    /**
+     * @return the iri
+     */
+    public String getIri() {
+        return iri;
+    }
+    /**
+     * @param iri the iri to set
+     */
+    public void setIri(String iri) {
+        this.iri = iri;
+    }
+    /**
+     * @return the label
+     */
+    public String getLabel() {
+        return label;
+    }
+    /**
+     * @param label the label to set
+     */
+    public void setLabel(String label) {
+        this.label = label;
+    }
+    /**
+     * @return the ram
+     */
+    public long getRam() {
+        return ram;
+    }
+    /**
+     * @param ram the ram to set
+     */
+    public void setRam(long ram) {
+        this.ram = ram;
+    }
+    /**
+     * @return the cpus
+     */
+    public int getCpus() {
+        return cpus;
+    }
+    /**
+     * @param cpus the cpus to set
+     */
+    public void setCpus(int cpus) {
+        this.cpus = cpus;
+    }
+}