Sort entries in .gitignore

Closes gh-10069

.gitignore

-.gradle
-*.sw?
-.#*
 *#
+*.iml
+*.ipr
+*.iws
+*.jar
+*.sw?
 *~
-/build
-/code
+.#*
+.*.md.html
+.DS_Store
 .classpath
-.project
-.settings
-.metadata
 .factorypath
+.gradle
+.idea
+.metadata
+.project
 .recommenders
+.settings
+.springBeans
+/build
+/code
+MANIFEST.MF
+_site/
+activemq-data
 bin
 build
-lib/
-target
-.springBeans
-interpolated*.xml
-dependency-reduced-pom.xml
 build.log
-_site/
-.*.md.html
+dependency-reduced-pom.xml
+dump.rdb
+interpolated*.xml
+lib/
 manifest.yml
-MANIFEST.MF
-settings.xml
-activemq-data
 overridedb.*
-*.iml
-*.ipr
-*.iws
-.idea
-*.jar
-.DS_Store
-dump.rdb
+settings.xml
+target
 transaction-logs