Merge pull request #1 from pepov/master

extend plugin to support dynamic port pool
Add test for PortAllocationManager#allocate()
Test allocateRandom
Fix comment typo.
Add PortAllocationManager#allocateConsecutivePortRange to allow multiple
ports to be allocated together within a specific range of ports.
This forms part of the fix for JENKINS-12821 in android-emulator-plugin..
Merge pull request #2 from oldelvet/jenkins-12821

Add PortAllocationManager#allocateConsecutivePortRange
Update pom.xml as recommended in
https://wiki.jenkins-ci.org/display/JENKINS/Hosting+Plugins
Correct stray : in developerConnection
[maven-release-plugin] prepare release port-allocator-1.6
[maven-release-plugin] prepare for next development iteration
Update core dependency to 1.424 to fix builds with OpenJDK compilers
JENKINS-18786 remove ResourceActivity, that blocks jobs on different slaves