NIFI-5446: Specify the file encoding option to UTF-8 in pom.xml
NIFI-5446: Specify the file encoding option to UTF-8 in pom.xml

This closes #2910.

Signed-off-by: Koji Kawamura <be50a4b722203f660590ccac7eb8cd7a309d1b16@apache.org>

trixpan/nifi,mcgilman/nifi,m-hogue/nifi,mattyb149/nifi,mattyb149/nifi,ijokarumawak/nifi,m-hogue/nifi,trixpan/nifi,pvillard31/nifi,ijokarumawak/nifi,mcgilman/nifi,YolandaMDavis/nifi,mcgilman/nifi,m-hogue/nifi,MikeThomsen/nifi,mcgilman/nifi,jskora/nifi,mans2singh/nifi,MikeThomsen/nifi,patricker/nifi,ijokarumawak/nifi,peter-gergely-horvath/nifi,aperepel/nifi,patricker/nifi,alopresto/nifi,pvillard31/nifi,jtstorck/nifi,alopresto/nifi,ijokarumawak/nifi,mattyb149/nifi,jtstorck/nifi,peter-gergely-horvath/nifi,YolandaMDavis/nifi,jfrazee/nifi,mattyb149/nifi,mans2singh/nifi,m-hogue/nifi,pvillard31/nifi,pvillard31/nifi,patricker/nifi,jtstorck/nifi,MikeThomsen/nifi,bbende/nifi,mans2singh/nifi,jskora/nifi,m-hogue/nifi,apsaltis/nifi,pvillard31/nifi,aperepel/nifi,trixpan/nifi,apsaltis/nifi,jskora/nifi,mans2singh/nifi,trixpan/nifi,aperepel/nifi,bbende/nifi,YolandaMDavis/nifi,YolandaMDavis/nifi,aperepel/nifi,m-hogue/nifi,aperepel/nifi,alopresto/nifi,pvillard31/nifi,MikeThomsen/nifi,patricker/nifi,peter-gergely-horvath/nifi,jtstorck/nifi,MikeThomsen/nifi,patricker/nifi,m-hogue/nifi,mcgilman/nifi,bbende/nifi,mans2singh/nifi,mcgilman/nifi,YolandaMDavis/nifi,bbende/nifi,apsaltis/nifi,joewitt/incubator-nifi,mattyb149/nifi,jskora/nifi,joewitt/incubator-nifi,jfrazee/nifi,apsaltis/nifi,jfrazee/nifi,mattyb149/nifi,alopresto/nifi,trixpan/nifi,bbende/nifi,peter-gergely-horvath/nifi,MikeThomsen/nifi,jskora/nifi,jtstorck/nifi,YolandaMDavis/nifi,ijokarumawak/nifi,alopresto/nifi,pvillard31/nifi,jtstorck/nifi,trixpan/nifi,joewitt/incubator-nifi,peter-gergely-horvath/nifi,ijokarumawak/nifi,jskora/nifi,YolandaMDavis/nifi,patricker/nifi,jfrazee/nifi,alopresto/nifi,mans2singh/nifi,MikeThomsen/nifi,jtstorck/nifi,aperepel/nifi,mattyb149/nifi,apsaltis/nifi,pvillard31/nifi,peter-gergely-horvath/nifi,jfrazee/nifi,mcgilman/nifi,apsaltis/nifi,alopresto/nifi,bbende/nifi,jfrazee/nifi,patricker/nifi,jfrazee/nifi,jfrazee/nifi,joewitt/incubator-nifi,joewitt/incubator-nifi,joewitt/incubator-nifi