(CFACT-96) remove redundant mountpoints check in solaris filesystem resolver

Previously, the filesystem resolver checked for the existance of mountpoints
before returing the list of supported filesystems. However this is incorrect.
This patch removes the redundant mountpoints check.
Merge pull request #147 from vrthra/fix/cfact-96/solaris-filesystems

(CFACT-96) remove redundant mountpoints check in solaris filesystem resolver
(CFACT-91) Add Windows external fact infrastructure.

Add some external fact support, with framework for executables.
New to Windows are batch files and Powershell scripts.
Partial implementation of process execution
Add link for redirecting input/output with CreateProcess