protobuf from home:interstar001:nscp project

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:interstar001:nscp/15.6/home:interstar001:nscp.repo
zypper refresh
zypper install protobuf

For 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:interstar001:nscp/15.5/home:interstar001:nscp.repo
zypper refresh
zypper install protobuf

For 15.4 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:interstar001:nscp/15.4/home:interstar001:nscp.repo
zypper refresh
zypper install protobuf

For 15.3 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:interstar001:nscp/15.3/home:interstar001:nscp.repo
zypper refresh
zypper install protobuf

For SLE 12 SP5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/home:interstar001:nscp/SLE_12_SP5/home:interstar001:nscp.repo
zypper refresh
zypper install protobuf