bgp: Clean up syntax in services/protocols/bgp/operator/views/base.py to avoid SyntaxErrors
bgp: Clean up syntax in services/protocols/bgp/operator/views/base.py to avoid SyntaxErrors

When byte-compiled, base.py in the bgp protocol service generates a large number of SyntaxErrors for me.
This patch cleans up the SyntaxErrors, while retaining the original (intended?) semantics.

Signed-off-by: Victor J. Orlikowski <72c670095bbd38b67036897d6da3425e0645f984@duke.edu>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

TakeshiTseng/ryu,pichuang/ryu,osrg/ryu,zangree/ryu,shinpeimuraoka/ryu,hisaharu/ryu,pichuang/ryu,osrg/ryu,fkakuma/ryu,osrg/ryu,iwaseyusuke/ryu,fkakuma/ryu,zangree/ryu,lagopus/ryu-lagopus-ext,lagopus/ryu-lagopus-ext,takahashiminoru/ryu,Tejas-Subramanya/RYU_MEC,gareging/SDN_Framework,Tejas-Subramanya/RYU_MEC,pichuang/ryu,Tejas-Subramanya/RYU_MEC,iwaseyusuke/ryu,shinpeimuraoka/ryu,fkakuma/ryu,zangree/ryu,pichuang/ryu,fujita/ryu,gareging/SDN_Framework,habibiefaried/ryu,pichuang/ryu,iwaseyusuke/ryu,osrg/ryu,habibiefaried/ryu,habibiefaried/ryu,habibiefaried/ryu,gareging/SDN_Framework,TakeshiTseng/ryu,alanquillin/ryu,TakeshiTseng/ryu,hisaharu/ryu,hisaharu/ryu,alanquillin/ryu,Tejas-Subramanya/RYU_MEC,shinpeimuraoka/ryu,shinpeimuraoka/ryu,shinpeimuraoka/ryu,osrg/ryu,fkakuma/ryu,alanquillin/ryu,gareging/SDN_Framework,fkakuma/ryu,zangree/ryu,iwaseyusuke/ryu,lagopus/ryu-lagopus-ext,fujita/ryu,takahashiminoru/ryu,takahashiminoru/ryu,iwaseyusuke/ryu,fujita/ryu,Tejas-Subramanya/RYU_MEC,TakeshiTseng/ryu,lagopus/ryu-lagopus-ext,lagopus/ryu-lagopus-ext,hisaharu/ryu,takahashiminoru/ryu,zangree/ryu,TakeshiTseng/ryu,habibiefaried/ryu,alanquillin/ryu,fujita/ryu,gareging/SDN_Framework,hisaharu/ryu,fujita/ryu,takahashiminoru/ryu,alanquillin/ryu