dist: redhat: build_rpm: don't install git, wget, yum-utils during build
dist: redhat: build_rpm: don't install git, wget, yum-utils during build

Those utilities aren't used for building the rpm, and risk failing
the build on network access.

Fixes #161.

scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java,scylladb/scylla-tools-java