Complete the move to managed plugins - drop support for unmanaged ones

[msterin]

In #1006 we added managed plugins support
To complete this, we already have #1033 (photoOS support) and #1020 (CI / full build) issues.

We also need to

• drop build and use of .rpm/.deb. We can still have the targets in Makefile in case we need it for troubleshooting or comparison, but they should not be a part of regular build.
• change all tests to use the managed plugins (since in Build and test managed plugin support in CI #1020 we focus only ADDING management plugin test)
• update documentation to refer to Docker managed plugin in, and give an example of vDVS install, plus debug option (fixed Update README.md #1115)

Few more action items (notes from @shuklanirdesh82)

• upgrade all test VMs to use docker 1.13/17.03 (keep last two docker releases)
• install make utility to all VMs

//CC @shuklanirdesh82 @tusharnt

[tusharnt]

The following action item will be aimed at 0.13.

• update documentation to refer to Docker managed plugin in, and give an example of vDVS install, plus debug option (see Update README.md #1115)

[shuklanirdesh82]

@msterin

drop build and use of .rpm/.deb. We can still have the targets in Makefile in case we need it for troubleshooting or comparison, but they should not be a part of regular build.

with PR #1163,DEB/RPM usage support is dropped but build support is still exist (as decided to keep for next 2-3 releases), I am opening a new issue to track required work on dropping build/publish support for DEB/RPM