packaging: api: redirect /api to /ovirt-engine/api using apache rewrite rules

Using forward servlet is not a complete solution as there is some
limitation of sharing context.

So java based solution is not easily possible.

Jboss rewrite rules cannot be used as it ignores the matrix ';' suffix.

Using apache.

One side effect is a redirect between /api and /api/ as apache must
normalize the directory due to internal limitation.

Tested using:
httpd-2.2.22-25.ep6.el6.x86_64
httpd-2.4.6-2.fc19.x86_64

Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1031597
Change-Id: I2ad9bb362719c7805be9f69d7e14bd3ad7b1f5c7
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>