Update OVSDB Pom files for sortpom plugin

Auto-sorting of pom files was introduced in
https://git.opendaylight.org/gerrit/#/c/6247/

As the OVSDB pom's are children they too must be auto-sorted.
`mvn clean install` was used to sort the poms for this commit.

Change-Id: I2cb85c092452c94018334271bc37b4bc474d6e97
Signed-off-by: Dave Tucker <djt@redhat.com>