Yum: support pkg-map in bin/install-packages

Updates the yum element's bin/install-packages script
so that if supports using pkg-map instead of map-packages
for package mapping. To make use of the new change
simply add the -m <element name> to allow install-packages
to know which element namespace to use when installing packages.

Use of the new -m option is off by default.

As part of this change we also updated install-packages
to use getopt for in script argument parsing.

Change-Id: I19240e74b69859f7faf9cd80440633234a677d63
Delete redhat-common 00-usr-local-bin-secure-path

Both the rpm-distro and redhat-common elements had the
same exact 00-usr-local-bin-secure-path. This commit
deletes the one in redhat-common and leaves the one
in rpm-distro (which is also required by the same
elements).

Change-Id: Ie9ef29d268b3737a6741fce016ef335db6651b59
Name 01-install-bin uniquely

While an end user would never use these elements at the same time we
should always use unique names for things per DIB conventions.

Change-Id: I53b10522183e8566c62922b91878e5cf767fe2c6
Name 10-rhel-cloud-image uniquely

Updates the rhel7 version to be named 10-rhel7-cloud-image

Change-Id: I8d3eec989ee60f48c4895423f23e0ddff5a9cb14
Merge "Yum: support pkg-map in bin/install-packages"
Merge "Delete redhat-common 00-usr-local-bin-secure-path"
Merge "Name 01-install-bin uniquely"
Merge "Name 10-rhel-cloud-image uniquely"