LAKITU: Increase retry options for SSH into a VM.

Recently, lakitu-arm64 builds have been failing during the VMTests. This is happening because the VM created for test is not completely booted up in case of ARM.
Due to this, the first test fails due to SSH problem. This CL is increasing the number of tries for SSH when a VM is created.

BUG=b/197269863
TEST=multiple presubmit for lakitu-arm64.
RELEASE_NOTE=None

Change-Id: Iddcc24ab48e475b6300b325a4839003f6f71dd20
(cherry picked from commit 381468952a4bdeaa6dd54cb5e038baac43a133fd)
diff --git a/lib/vm.py b/lib/vm.py
index a86b98f..c0fc448 100644
--- a/lib/vm.py
+++ b/lib/vm.py
@@ -713,7 +713,7 @@
     # utility-process, 3 renderers.
     _WaitForProc('chrome', 8)
 
-  def WaitForBoot(self, max_retry=3, sleep=5):
+  def WaitForBoot(self, max_retry=5, sleep=5):
     """Wait for the VM to boot up.
 
     Wait for ssh connection to become active, and wait for all expected chrome