docs: Update the release notes for 1.1.5, 1.1.6, 1.2.1
docs: Update the release notes for 1.1.5, 1.1.6, 1.2.1

[ci skip]

jplock/dropwizard,tjcutajar/dropwizard,Alexey1Gavrilov/dropwizard,pkwarren/dropwizard,mosoft521/dropwizard,micsta/dropwizard,Alexey1Gavrilov/dropwizard,dropwizard/dropwizard,Alexey1Gavrilov/dropwizard,micsta/dropwizard,tjcutajar/dropwizard,phambryan/dropwizard,phambryan/dropwizard,pkwarren/dropwizard,mosoft521/dropwizard,micsta/dropwizard,jplock/dropwizard,nickbabcock/dropwizard,dropwizard/dropwizard,dropwizard/dropwizard,mosoft521/dropwizard,jplock/dropwizard,pkwarren/dropwizard,phambryan/dropwizard,nickbabcock/dropwizard,tjcutajar/dropwizard,nickbabcock/dropwizard