solver: Add abstract solver class.

src/solver/ASolver.py

+# -*- coding: utf-8 -*-
+
+import os
+import subprocess
+from enum import Enum
+
+class STATUS(Enum):
+    STOPED = 0
+    RUNNING = 1
+    FAILED = 2
+    CONF_ERROR = 3
+
+class AbstractSolver(object):
+    def __init__(self, name):
+        super(AbstractSolver, self).__init__()
+
+        self.name = name
+        self.status = STATUS.STOPED
+
+    def nb_proc(self):
+        """
+        Return the number of processor used by solver (usefull for
+        multiple solver run on same time).
+        """
+        return 1
+
+    def status(self):
+        return self.status
+
+    def set_status(self, status):
+        self.status = status
+
+    def run(self):
+        return False
+
+    def kill(self):
+        return False
+
+    def readline(self):
+        return ""