shill: cellular: Increase GetIMSI retry limit and interval.

BUG=chromium-os:37190
TEST=Tested the following:
1. Build and run unit tests.
2. Run suspend/resume tests on lumpy and daisy and verify that shill can
   obtain the IMSI after each suspend/resume cycle.

Change-Id: Ic0d0b3f909284df93a84c7c441980d02c9988271
Reviewed-on: https://gerrit.chromium.org/gerrit/39613
Reviewed-by: Arman Uguray <armansito@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Ready: Ben Chan <benchan@chromium.org>
diff --git a/cellular_capability_gsm.cc b/cellular_capability_gsm.cc
index 49f56d2..e76438c 100644
--- a/cellular_capability_gsm.cc
+++ b/cellular_capability_gsm.cc
@@ -46,8 +46,8 @@
 const char CellularCapabilityGSM::kPropertyUnlockRequired[] = "UnlockRequired";
 const char CellularCapabilityGSM::kPropertyUnlockRetries[] = "UnlockRetries";
 
-const int CellularCapabilityGSM::kGetIMSIRetryLimit = 10;
-const int64 CellularCapabilityGSM::kGetIMSIRetryDelayMilliseconds = 200;
+const int CellularCapabilityGSM::kGetIMSIRetryLimit = 40;
+const int64 CellularCapabilityGSM::kGetIMSIRetryDelayMilliseconds = 500;
 
 
 CellularCapabilityGSM::CellularCapabilityGSM(Cellular *cellular,