bootkube/tls: fix bootstrap secrets for external etcd cluster (#1490)
bootkube/tls: fix bootstrap secrets for external etcd cluster (#1490)

- fix bug where etcd client key template file was generated from etcd client cert file
- write out etcd client key, etcd client cert and ca files to disk in all cases where file exists
- make sure https connection to etcd is detected even if no etcd client ca is specified (publicly signed etcd client interface)
AduroIdeja/tectonic-installer,AduroIdeja/tectonic-installer,rithujohn191/tectonic-installer,bsiegel/tectonic-installer,justaugustus/tectonic-installer,radhikapc/tectonic-installer,squat/tectonic-installer,mrwacky42/tectonic-installer,kyoto/tectonic-installer,everett-toews/tectonic-installer,squat/tectonic-installer,coreos/tectonic-installer,s-urbaniak/tectonic-installer,bsiegel/tectonic-installer,metral/tectonic-installer,everett-toews/tectonic-installer,derekhiggins/installer,bsiegel/tectonic-installer,justaugustus/tectonic-installer,alexsomesan/tectonic-installer,zbwright/tectonic-installer,joshrosso/tectonic-installer,zbwright/tectonic-installer,rithujohn191/tectonic-installer,yifan-gu/tectonic-installer,cpanato/tectonic-installer,joshix/tectonic-installer,s-urbaniak/tectonic-installer,yifan-gu/tectonic-installer,mrwacky42/tectonic-installer,joshrosso/tectonic-installer,alexsomesan/tectonic-installer,everett-toews/tectonic-installer,rithujohn191/tectonic-installer,justaugustus/tectonic-installer,rithujohn191/tectonic-installer,cpanato/tectonic-installer,hhoover/tectonic-installer,coreos/tectonic-installer,zbwright/tectonic-installer,AduroIdeja/tectonic-installer,metral/tectonic-installer,kyoto/tectonic-installer,derekhiggins/installer,joshix/tectonic-installer,hhoover/tectonic-installer,joshrosso/tectonic-installer,lander2k2/tectonic-installer,colemickens/tectonic-installer,radhikapc/tectonic-installer,metral/tectonic-installer,enxebre/tectonic-installer,lander2k2/tectonic-installer,aknuds1/tectonic-installer,joshrosso/tectonic-installer,yifan-gu/tectonic-installer,kyoto/tectonic-installer,cpanato/tectonic-installer,yifan-gu/tectonic-installer,hhoover/tectonic-installer,colemickens/tectonic-installer,mrwacky42/tectonic-installer,kalmog/tectonic-installer,aknuds1/tectonic-installer,s-urbaniak/tectonic-installer,s-urbaniak/tectonic-installer,coreos/tectonic-installer,hhoover/tectonic-installer,colemickens/tectonic-installer,alexsomesan/tectonic-installer,justaugustus/tectonic-installer,kalmog/tectonic-installer,aknuds1/tectonic-installer,zbwright/tectonic-installer,radhikapc/tectonic-installer,kyoto/tectonic-installer,bsiegel/tectonic-installer,kalmog/tectonic-installer,joshix/tectonic-installer,coreos/tectonic-installer,enxebre/tectonic-installer,metral/tectonic-installer,alexsomesan/tectonic-installer,enxebre/tectonic-installer,joshix/tectonic-installer,kyoto/tectonic-installer,joshix/tectonic-installer,bsiegel/tectonic-installer,yifan-gu/tectonic-installer,coreos/tectonic-installer,everett-toews/tectonic-installer,zbwright/tectonic-installer,radhikapc/tectonic-installer,alexsomesan/tectonic-installer,cpanato/tectonic-installer,everett-toews/tectonic-installer,enxebre/tectonic-installer,joshrosso/tectonic-installer,lander2k2/tectonic-installer,colemickens/tectonic-installer,aknuds1/tectonic-installer,squat/tectonic-installer,colemickens/tectonic-installer,AduroIdeja/tectonic-installer,mrwacky42/tectonic-installer,rithujohn191/tectonic-installer,hhoover/tectonic-installer,justaugustus/tectonic-installer,lander2k2/tectonic-installer,mrwacky42/tectonic-installer,s-urbaniak/tectonic-installer,squat/tectonic-installer,AduroIdeja/tectonic-installer,enxebre/tectonic-installer,aknuds1/tectonic-installer,metral/tectonic-installer