Increase process loop delay for cellular network

* Increase process loop delay for cellular network.
* Update cellular submodule to reduce HL7800 error message due to
  unsupported command.

Author: chinglee-iot

lib/cellular

@@ -307,7 +307,7 @@
     <ClCompile>
       <Optimization>Disabled</Optimization>
       <AdditionalIncludeDirectories>.\..\..\lib\cellular\include;.\..\..\lib\cellular\common\include;.\..\..\lib\cellular\common\include\private;.\..\..\lib\FreeRTOS\portable\MSVC-MingW;.\..\..\lib\FreeRTOS\include;.\..\..\lib\coreMQTT\source\portable;.\..\..\lib\coreMQTT\source\include;.\..\..\lib\coreMQTT\source\interface;.\..\..\lib\mbedtls\include;.\..\..\source;.\..\..\source\coreMQTT;.\..\..\source\mbedtls;.\..\..\source\cellular;.\..\..\source\FreeRTOS;.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>MBEDTLS_CONFIG_FILE="mbedtls_config.h";WIN32;_DEBUG;_CONSOLE;_WIN32_WINNT=0x0500;WINVER=0x400;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>MBEDTLS_CONFIG_FILE="mbedtls_config.h";WIN32;_DEBUG;_CONSOLE;_WIN32_WINNT=0x0500;WINVER=0x400;_CRT_SECURE_NO_WARNINGS;CELLULAR_MODEM_NO_GSM_NETWORK;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>false</MinimalRebuild>
       <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>

projects/hl7802_mqtt_mutual_auth_demo/WIN32.vcxproj

@@ -153,7 +153,7 @@
 /**
  * @brief Timeout for MQTT_ProcessLoop in milliseconds.
  */
-#define mqttexamplePROCESS_LOOP_TIMEOUT_MS                ( 500U )
+#define mqttexamplePROCESS_LOOP_TIMEOUT_MS                ( 5000U )
 
 /**
  * @brief Keep alive time reported to the broker while establishing