Description of problem:
The python script in VMAccess Extension(Or other Extensions) introduces that it requires python2.7+. But in rhel6.8 the python version is 2.6.6. There may be some risks about the compatibility.
VMAccess Extension is called in some common features like "reset password" and "reset remote access" in ASM mode.

Version-Release number of selected component (if applicable):
WALinuxAgent-2.0.18-rc4(upstream)
Microsoft.OSTCExtensions.VMAccessForLinux-1.4.0.0
RHEL6.8-20160315.0

How reproducible:
Always

Steps to Reproduce:
1. Prepare a RHEL6.8 VM with WALinuxAgent installed in ASM mode. Execute "reset password" or "reset remote access" on it.
2. Access to the VM. See the introduction on the top of the Extension script.
# vi /var/lib/waagent/Microsoft.OSTCExtensions.VMAccessForLinux-1.4.0.0/vmaccess.py
3. Check the python version on RHEL6.8
# python --version

Actual results:
In step 2, we can see the python version require message in the introduction: # Requires Python 2.7+
In step 3, python version on RHEL6.8 is python 2.6.6

Expected results:
The Azure Extension required python version should be match or lower than RHEL6.8.

Additional info:
None