Add Install method to software.

tests/integration_tests/system/test_database_on_node.py

@@ -0,0 +1,22 @@
+from primaite.simulator.network.hardware.base import Node
+from primaite.simulator.network.transmission.transport_layer import Port
+from primaite.simulator.system.services.database import DatabaseService
+from primaite.simulator.system.services.service import ServiceOperatingState
+from primaite.simulator.system.software import SoftwareCriticality, SoftwareHealthState
+
+
+def test_installing_database():
+    db = DatabaseService(
+        name="SQL-database",
+        health_state_actual=SoftwareHealthState.GOOD,
+        health_state_visible=SoftwareHealthState.GOOD,
+        criticality=SoftwareCriticality.MEDIUM,
+        ports=[
+            Port.SQL_SERVER,
+        ],
+        operating_state=ServiceOperatingState.RUNNING,
+    )
+
+    node = Node(hostname="db-server")
+
+    node.install_service(db)