devtool/recipetool fixes rollup

This patchset rolls up a few of the pending patches with minimal changes and introduces a couple of mine.

Leo's import/export patches have had the file change function patch squashed into the import patch, and I also made it use DevtoolError instead of logger.error()+sys.exit() in a couple of places, used with... to ensure the tarfile got closed in the import module and tweaked the commit messages.

In Rebecca's devtool upgrade patch I removed an unnecessary sys.exit() after raise DevtoolError(...).

These patches have passed oe-selftest devtool/recipetool tests locally.

The following changes since commit 5c9ef0734d23909b5694ed43cdbb205c2ba9ca95:

devtool/copy_buildsystem: adds meta-skeleton layer in the eSDK installation. (2017-08-19 22:15:25 +0100)

are available in the git repository at:

git://git.openembedded.org/openembedded-core-contrib paule/devtool28-oe
http://cgit.openembedded.org/openembedded-core-contrib/log/?h=paule/devtool28-oe

Chang Rebecca Swee Fun (3):
recipetool: create: disable PREMIRRORS and MIRRORS by default
recipetool: create: being able to set branch when revision is provided
devtool: upgrade: enable branch checking when revision is provided

Leonardo Sandoval (3):
devtool: export: new plugin to export the devtool workspace
devtool: append md5sum only if not already present
devtool: import: new plugin to import the devtool workspace

Paul Eggleton (2):
recipetool: allow plugins to set PN / PV more easily
recipetool: allow plugins to set LICENSE and LIC_FILES_CHKSUM

Stanley Phoong (2):
recipetool: create: handle git URLs specifying only a tag
recipetool: create: replacing PV in SRCURI

 scripts/lib/devtool/__init__.py      |  36 ++++++
 scripts/lib/devtool/export.py        | 119 ++++++++++++++++++++
 scripts/lib/devtool/import.py        | 144 ++++++++++++++++++++++++
 scripts/lib/devtool/standard.py      |   7 +-
 scripts/lib/devtool/upgrade.py       |  27 ++++-
 scripts/lib/recipetool/create.py     | 205 +++++++++++++++++++++++++++--------
 scripts/lib/recipetool/create_npm.py |  44 +-------
 scripts/lib/scriptutils.py           |   9 +-
 8 files changed, 495 insertions(+), 96 deletions(-)
 create mode 100644 scripts/lib/devtool/export.py
 create mode 100644 scripts/lib/devtool/import.py

2.9.5