add missing packages for UI builds

[pranavgore09]

This builder image is being used inside fabric8-planner builds.
Jenkins file https://github.com/fabric8-ui/fabric8-planner/blob/master/Jenkinsfile#L14 --> groovy script https://github.com/fabric8io/fabric8-pipeline-library/blob/master/vars/fabric8UITemplate.groovy#L9 --> https://hub.docker.com/r/fabric8/fabric8-ui-builder/tags/

and fabric8-planner builds are showing an error on console e.g> https://jenkins.cd.test.fabric8.io/job/fabric8-ui/job/fabric8-planner/job/master/129/consoleFull

make: Entering directory `/home/jenkins/workspace/8-ui_fabric8-planner_master-ZPP4IZOIOGZC2EHZQQ2O5PEN76546POVNRCE6JLDNBSQQFFN5RDA@2/node_modules/integer/build'
  CXX(target) Release/obj.target/integer/src/integer.o
make: g++: Command not found
make: *** [Release/obj.target/integer/src/integer.o] Error 127
make: Leaving directory `/home/jenkins/workspace/8-ui_fabric8-planner_master-ZPP4IZOIOGZC2EHZQQ2O5PEN76546POVNRCE6JLDNBSQQFFN5RDA@2/node_modules/integer/build'
gyp ERR! build error 
gyp ERR! stack Error: `make` failed with exit code: 2

So I feel that we are missing few packages and need to install them.
Following are packages we need to run the build smoothly

• groupinstall 'Development Tools'
• gcc-c++"

Ref:
facebook/react#3744 (comment)
https://unix.stackexchange.com/a/32439

Once merged I hope to see the changes in fabric8-cd whenever I use container('ui') in my Jenkins file

[fabric8cd]

snapshot fabric8-ui-builder image is available for testing. docker pull fabric8/fabric8-ui-builder:SNAPSHOT-PR-6-1

[pranavgore09]

before the merge, I would like to use this snapshot first! :)

[rupalibehera]

@pranavgore09 , you can fork this library https://github.com/fabric8io/fabric8-pipeline-library/blob/master/vars/fabric8UITemplate.groovy#L9 and make change the image to this "fabric8/fabric8-ui-builder:SNAPSHOT-PR-6-1" and then raise a PR here https://github.com/fabric8-ui/fabric8-planner changing https://github.com/fabric8-ui/fabric8-planner/blob/master/Jenkinsfile#L1 to your fork and branch for eg: github.com/pranavgore09/fabric8-pipeline-library@test-branch, in the CI pipeline we can check if it is going well.

[pranavgore09]

yes @rupalibehera doing the same!

[pranavgore09]

Created fabric8io/fabric8-pipeline-library#375
and fabric8-ui/fabric8-planner#2418

and we can verify cahnges on https://jenkins.cd.test.fabric8.io/job/fabric8-ui/job/fabric8-planner/job/PR-2418/1/

[joshuawilson]

please validate the other UI builds before you merge this