Prepare release notes for v1.7.0-beta.2

Signed-off-by: Derek McGowan <derek@mcg.dev>

.mailmap

@@ -6,6 +6,7 @@ Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> <suda.akihiro@lab.ntt.co.jp>
 Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> <suda.kyoto@gmail.com>
 Allen Sun <shlallen1990@gmail.com> <allensun@AllenSundeMacBook-Pro.local>
 Alexander Morozov <lk4d4math@gmail.com> <lk4d4@docker.com>
+Antonio Ojea <antonio.ojea.garcia@gmail.com> <aojea@google.com>
 Antonio Ojea <antonio.ojea.garcia@gmail.com> <aojea@redhat.com>
 Amit Krishnan <krish.amit@gmail.com> <amit.krishnan@oracle.com>
 Andrei Vagin <avagin@virtuozzo.com> <avagin@openvz.org>
@@ -58,6 +59,7 @@ John Howard <github@lowenna.com>
 John Howard <github@lowenna.com> <john.howard@microsoft.com>
 John Howard <github@lowenna.com> <jhoward@microsoft.com>
 John Howard <github@lowenna.com> <jhowardmsft@users.noreply.github.com>
+Junyu Liu <ljyngup@gmail.com>
 LongtaoZhang <DragonBillow@outlook.com>
 Lorenz Brun <lorenz@brun.one> <lorenz@nexantic.com>
 Luc Perkins <lucperkins@gmail.com>
@@ -103,6 +105,7 @@ Nishchay Kumar <mrawesomenix@gmail.com>
 Oliver Stenbom <oliver@stenbom.eu> <ostenbom@pivotal.io>
 Phil Estes <estesp@gmail.com> <estesp@linux.vnet.ibm.com>
 Phil Estes <estesp@gmail.com> <estesp@amazon.com>
+Qian Zhang <cosmoer@qq.com>
 Reid Li <reid.li@utexas.edu>
 Robin Winkelewski <w9ncontact@gmail.com>
 Ross Boucher <rboucher@gmail.com>
@@ -136,6 +139,7 @@ wanglei <wllenyj@linux.alibaba.com> <wanglei01@alibaba-inc.com>
 wangzhan <wang.zhan@smartx.com>
 Wei Fu <fuweid89@gmail.com>
 Wei Fu <fuweid89@gmail.com> <fhfuwei@163.com>
+wen chen <wen.chen@daocloud.io>
 Xiaodong Zhang <a4012017@sina.com>
 Xuean Yan <yan.xuean@zte.com.cn>
 Yang Yang <yang8518296@163.com>