BIGTOP-3387: Building QFS fails on CentOS 8

[sekikn]

No description provided.

[sekikn]

I confirmed that building qfs succeeded on CentOS 7 (as a regression test), 8 and Fedora 31 with this PR.

[guyuqi]

The build command:
docker run --rm -v pwd:/ws --workdir /ws bigtop/slaves:trunk-centos-8 bash -c '. /etc/profile.d/bigtop.sh; qfs-pkg yum'

It seems to encounter a dependencies issue of net-tools .

> Task :qfs-rpm FAILED
Installing /ws/output/qfs/qfs-2.0.0-1.el8.src.rpm
error: Failed build dependencies:
        net-tools is needed by qfs-2.0.0-1.el8.x86_64

FAILURE: Build failed with an exception.

[sekikn]

@guyuqi Thanks! I missed that because I tested with a VM on which net-tools was already installed.

[sekikn]

Updated the PR. I confirmed this version worked with the docker image, as follows:

$ cd docker/bigtop-slaves
$ ./build.sh trunk-centos-8

(snip)

BUILD SUCCESSFUL in 1m 1s
1 actionable task: 1 executed
Removing intermediate container 178174f487bc
 ---> 4de878edc397
Successfully built 4de878edc397
Successfully tagged bigtop/slaves:trunk-centos-8
++ rm -f Dockerfile
$ cd -
$ docker run --rm -v $(pwd):/ws --workdir /ws bigtop/slaves:trunk-centos-8 bash -c '. /etc/profile.d/bigtop.sh; ./gradlew qfs-clean qfs-pkg yum'

(snip)

> Task :qfs-pkg

> Task :yum
Directory walk started
Directory walk done - 18 packages
Temporary output repo path: /ws/output/.repodata/
Preparing sqlite DBs
Pool started (with 5 workers)
Pool finished

BUILD SUCCESSFUL in 20m 1s
8 actionable tasks: 8 executed

[sekikn]

Merged into master. Thanks for the review @guyuqi!