REL-710: indeed-office internal release-candidate releases

requires new properties:
    indeed-oss-releases.upload.url
    indeed-oss-releases.download.url
REL-710: change download and upload url properties to use
'indeed-oss-internal-release' prefix to help remove ambiguity about
these settings

Add internal-release download repostiory
REL-710: remove the unnecessary <snapshots> and <releases> tag
Merge branch 'REL-710-internal-office-release' into 'master'

REL-710 internal office release

See merge request !1