Fix http url by using https
build/base: install openssh clients under RHEL
build/init: call pxemngr before sending the log
server/upload.py: rename previous log using a timestamp to be sure to have all the logs
build/deploy: install python-ecdsa from the package under RHEL to avoid conflicts
Merge pull request #115 from TristanCacqueray/http-fix-vuln

Fix http url by using https
build/common: clean /tmp and /var/tmp at the end of the build
build/create-image.sh: add / to fstab
build/init.common,server/upload.py: generate common names for .hw and .log.gz
build/deploy: allow to boot using gpxelinux.0 and over http
metadata: initial commit to prepare D7-I.1.2.0

Initial commit to prepare upgrade from D7-I.1.1.0 to D7-I.1.2.0 release
with eDeploy.