Add two more duplicates to mailmap

Fixing a small bug in my regexp searching for duplicates yielded two
additional hits. Fix by adding to the mailmap file.

.mailmap

@@ -17,6 +17,7 @@ Bradford Boyle <bboyle@pivotal.io> <bradfordboyle@users.noreply.github.com>
 Bradford Boyle <bboyle@pivotal.io> Bradford D. Boyle <bboyle@pivotal.io>
 Brendan Stephens <bstephens@pivotal.io> brendanstephens <bstephens@pivotal.io>
 C.J. Jameson <cjameson@pivotal.io> <cjcjameson@users.noreply.github.com>
+Chris Hajas <chajas@pivotal.io> Christopher Hajas <chajas@pivotal.io>
 David Krieger <dkrieger@pivotal.io> <42985115+dkrieger-pvtl@users.noreply.github.com>
 David Yozie <dyozie@pivotal.io> dyozie <dyozie@pivotal.io>
 Dhanashree Kashid <dkashid@pivotal.io> Dhanashree <dkashid@pivotal.io>
@@ -54,6 +55,7 @@ Melanie Plageman <mplageman@pivotal.io> <melanieplageman@gmail.com>
 Melanie Plageman <mplageman@pivotal.io> Melanie <melanieplageman@users.noreply.github.com>
 Michael Schubert <michael@schubert.cx> <pair+mschubert@pivotal.io>
 Michael Schubert <michael@schubert.cx> <schubert@users.noreply.github.com>
+Mike Roth <mroth@pivotal.io> Michael Roth <mroth@pivotal.io>
 Nikhil Kak <nkak@pivotal.io> kaknikhil <kaknikhil@users.noreply.github.com>
 Ning Wu <nwu@pivotal.io> Wu Ning <nwu@pivotal.io>
 Oliver Albertini <oalbertini@pivotal.io> <oliverralbertini@users.noreply.github.com>