CI: Allow restart of the container if it fails on the first attempt

In CI we sometimes encouter fail of the gNB/UE deployment (and fail of
the pipeline) caused by unsuccsessful initialization of the USRP N310.
Restart the container if the health check fails during initialization.

Introduce a configurable parameter (from XML) to set max number of
attempts for the container deployment.

Store logs from failed deployment attempts.

ci-scripts/tests/deployment.py

@@ -47,6 +47,7 @@ class TestDeploymentMethods(unittest.TestCase):
 		self.cont.eNBUserName = None
 		self.cont.eNBPassword = None
 		self.cont.eNBSourceCodePath = os.getcwd()
+		self.cont.num_attempts = 3
 
 	def test_deploy(self):
 		self.cont.yamlPath[0] = 'tests/simple-dep/'