fixed thread is alive check to handle py3.9 updates (microsoft#859)

* fixed thread is alive check to handle py3.9 updates

* updated the minor version

In case of redhat8 we have seen bin folder is cleaning during Preunin…

…stall , this is to avoid the issue. (microsoft#829)

In case of redhat8 we have seen bin folder is cleaning during Preuninstall , this is to avoid the issue.

Fixed issues with python 2.6 (microsoft#799)

* Fixed issues with python 2.6

sys.version_info.major doesn't work for python 2.6 but works for 2.7

So decided to log sys.version_info which works for all python versions

* Fixed case where comparing stdout bytes to a string (microsoft#800)

Added support for python 3 for DIY DSC (microsoft#789)


Summary of changes included as a part of the PR:

Porting changes (Fixes) to run all scripts on python 3
Updated DSC default resources offered under nx to run on python 3.
Added additional logging to all python scripts.
Fixes for bugs that were introduced as a part of DROP OMI Depenedency.
Description of the changes:
As a part of porting the code we had decided to keep the code for python3 in a seperate forlder.(Most of these changes were done as a part of OMSConfig Py3 support PR). The updated folder for python scripts is as follows:

python2 : /opt/microsoft/dsc/Scripts
python3: /opt/microsoft/dsc/Scripts/python3
The python version of the machine will be determined by checking the existance of python2 and python3 command. In this version python2 takes precidence if both python 2 and 3 are present. (This is done to maintain compabality for older distros.)

Instead of just logging success and failure a lot of debug and detailed logs ave been added. Going forward DSC will have two log files:

/var/opt/omi/log/dsc.log
/var/opt/omi/log/dscdetailed.log
A lot of issues were discovered for the master branch, as the last release was done years back. I have tried to fix most of them. The issue were as a part of the DROP OMI DEPENDECY pr, which was only intended for omsconfig and ended up breaking DIY DSC.

Testing:
Manually tested for sanity and happy path secnarios on both python 2 and 3.
Distro testing is in progress using the test suite.
Bug bas planned for this week.


* Initial Changes to run locally

* Update InstallModule.py

* Updated helper scripts to account for new paths

* Updated providers to get invoked with python3 instead of python

* Fix FindFirstFile Failed bug that was introduced in 2019

* Fixed path to omicli for scripts

* Fixed the bug causing test to fail, it was introduced by a 2019 change DROP OMI DEPENDENCY

* Update CAEngine.c

* Added logs to python scripts

* Updated logging to capture python major version

* Added logs around compare in nxFile

* Removed logging from import module to get rid of circular dependency

* Removed logging from RegenerateInit to remove circular dependency

* Update RegenerateInitFiles.py

* Fixed comparison in case of python 3 for nxFile

* Updated imports for loggig to work

* Using absolute path instead of relative paths for DSCLogger

* Update Makefile to respect version provided in Build Repo

* Updated paths

* Updated Register.py

* Updated to remove warnings thrown for 'is'

* Update if such that we check instance details before reginstance

* Additioal logs to debug a failure in get configuration will revert the ones not required

* Removed additional logging (These were just for debugging and not required to be released)

* Removed additional logs

* Updating content to string as OMI is not able to handle bytes

* Resolving sekhar's comments

WLM: Auto Discovery: remove additional logs

Fixing omi preexec for dsc to check for nxFile so and py files

Update readme.md

Move basic documentation text from Release Notes to Readme

Explicitly disable -Werror in ./configure

If OMI is built with -Werror, then DSC will inherit the setting and fail
to build. Since DSC cannot be built with -Werror, we need to override
OMI's setting.

Updates to the build source kit script

 Valgrind is coming up pretty sparse now after these fixes.