Extract additional components from release name

For additional components, on our git repositories, the following convention is used:

• For security from Debian: apertis/RELEASE-security
• For backports from Debian: apertis/RELEASE-backports
• For updates from Debian: apertis/RELEASE-updates

For example: apertis/v2019-security

In our ci scripts, we use the branch name as the release name. This has been the convention so far. Thus this change adapts the current convention and extracts the additional components from it.

Exception Note: We will not be having Apertis release names with a hyphen.

So we rely on the '-' character to distinguish the additional component that is it targeted for.

Signed-off-by: Ritesh Raj Sarraf ritesh.sarraf@collabora.com