Add Core System and Upgrade APIs info and actions

[mib1185]

Hello,
this PR contains:

• shutdown and reboot function
• some detailed system informations
• check for available DSM update

regards,
Michael

[mib1185]

Hi @ProtoThis ,
I would lovely like to see this features in your great python-synology module, because I´m planning to also add some additional features to synology-dsm integration in home-assistant based on this PR.
So if you have any concerns about my PR, please let me know.
regards,
Michael

[Quentame]

Please add the test data accordingly.

In tests/api_data/dsm_6/core/, see other exemple for filename and const pattern.
Don't worry if you don't add a test, but at least the raw_data so someone else can do so.

[Quentame]

Be aware for Python 3.6+ now : #70

[mib1185]

Hi @Quentame

Thanks for your review.
I have pushed some commits to resolve your comments and some I have i only commented, too.

Be aware for Python 3.6+ now : #70

Because my dev environment is running on python 3.8.2, I asume no problems with #70
regards,
Michael

[Quentame]

There is conflits to resolve, then we are good to merge

[Quentame]

To solve conflits I recommand you to rebase on master, manage rebase conflicts, then force push

[mib1185]

thanks for hint to solve conflicts, but I'm a beginner when it comes to git and therefore I do not have any idea how to do this :/

[Quentame]

Do you want to try ?
Or I can do it.

[mib1185]

I tried it now three times, but did not get it solved :(
I think the problem is, that i do not have created a new branch on my fork (instead used the master) and now rebase my master to the projects master removes my commits/changes on my local working copy.
so yes, plaese resolve the conflict :)

[mib1185]

yeah ... I get the conflict resolved :)