SSDM-5783: revert removing jai library removed from build script of image-readers

SVN: 38897

image_readers/build.gradle

@@ -6,6 +6,7 @@ apply from: '../gradle/javaproject.gradle'
 dependencies {
     compile project(':common'),
         'imagej:ij:+',
+        'sun:jai:+',
         'bioformats:bioformats:+',
         'slf4j:slf4j:+',
         'slf4j:slf4j-log4j12:+'