pom: Change where default if groupid is set

Since groupid is a new key for -pom, it is safe to use a different
default for where when the groupid key is set. In this case the default
is META-INF/maven/${groupid}/${artifactid}/pom.xml instead of pom.xml.

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
Merge pull request #692 from bjhargrave/pom-where-default

pom: Change where default if groupid is set
pom test: Correct spelling of Bundle-Developers header

Use constants.

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
pom test: Add asserts for Bundle-Developers and Bundle-SCM headers

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
pom test: Remove trim() calls

pom xml no longer corrupts the value with leading or trailing whitespace.

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
Merge pull request #693 from bjhargrave/pom-test-fixes

Pom test fixes