- escape image alt attribute as it's breaking xml format in some metadata.xml

...main/java/org/bigbluebutton/api/util/ResponseBuilder.java

bbb-common-web/src/test/resources/get-meeting-info.ftlx

bbb-common-web/src/test/resources/get-recordings.ftlx

bbb-common-web/src/test/resources/include-recording.ftlx

...tton-web/web-app/WEB-INF/freemarker/get-meeting-info.ftlx

...uebutton-web/web-app/WEB-INF/freemarker/get-meetings.ftlx

...button-web/web-app/WEB-INF/freemarker/get-recordings.ftlx

...ton-web/web-app/WEB-INF/freemarker/include-recording.ftlx