functionexecution example

This is a very simple example showing how to execute a function on the server.
It creates a Cache using the CacheFactory, configures a Pool with a PoolFactory, and configures a Region with a RegionFactory. The startserver script deploys a jar file with several custom functions in it, and the example app executes those functions and prints out the result set(s).

Prerequisites

Install Apache Geode
Build and install Apache Geode Native
Apache Geode Native examples, built and installed
Set GEODE_HOME to the install directory of Apache Geode

Running

From a command shell, set the current directory to the functionexecution build directory in your example workspace.
```
$ cd workspace/examples/build/cpp/functionexecution
```
Run the startserver script to start the Geode cluster with authentication and create a region.
For Windows cmd:
```
$ powershell.exe -File startserver.ps1
```
For Windows Powershell:
```
$ startserver.ps1
```
For Bash:
```
$ ./startserver.sh
```

Execute cpp-functionexecution, expect the following output:

Result count = 3

Result[0]=VALUE--1
Result[1]=VALUE--2
Result[2]=VALUE--3

Run the stopserver script to gracefully shutdown the Geode cluster.
For Windows cmd:
```
$ powershell.exe -File stopserver.ps1
```
For Windows Powershell:
```
$ stopserver.ps1
```
For Bash:
```
$ ./stopserver.sh
```