Feature/config: allowSnapshotsFromSnapshots

[ggrandes]

New feature, improvement proposal: allowSnapshotsFromSnapshots

Something like:

if project.version.endsWith("-SNAPSHOT"); then 
    allowSnapshots=true
else 
    allowSnapshots=false

The idea is that if we are working on a SNAPTSHOT, we can include other SNAPSHOTs (submodules for example), but when we are going to produce a RELEASE, we want to verify that we have not left any SNAPSHOTs behind.

[ZachTylerPruitt]

Is this any different from the functionality that is already available?

<requireReleaseDeps>
    <onlyWhenRelease>true</onlyWhenRelease>
</requireReleaseDeps>

[ggrandes]

IDK; I'll have to try it.

My first issues was with...

<banDynamicVersions>
    <allowSnapshots>true/false</allowSnapshots>
</banDynamicVersions>