Comment # 1 on bug 1051387 from Frank Sundermeyer

Fixed 

for openSUSE 42.3 with https://github.com/SUSE/doc-sle/commit/bbc3880e
for SLE 12 SP3    with https://github.com/SUSE/doc-sle/commit/c555932c
for SLE 12 SP2    with https://github.com/SUSE/doc-sle/commit/c2cee61e