common.sh(print_log): update to handle maven output from the latest version.

Looks like Maven has been updated to 3.5.2 on TravisCI and its output changed to

[INFO] Downloading from central: http://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/1.5.7.RELEASE/spring-boot-starter-parent-1.5.7.RELEASE.pom
[INFO] Downloaded from central: http://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/1.5.7.RELEASE/spring-boot-starter-parent-1.5.7.RELEASE.pom
(7.5 kB at 50 kB/s)

I've updated regexp to handle both new and old outputs.

Author: php-coder

src/main/scripts/ci/common.sh

@@ -25,5 +25,5 @@ print_log() {
 	echo
 	printf "=====> \033[1;33m%s\033[0m\n" "$msg"
 	echo
-	grep -Ev '^\[INFO\] Download(ing|ed):' "$log_file" || :
+	grep -Ev '^\[INFO\] Download(ing|ed)' "$log_file" || :
 }