Format BUILD files with buildifier

Using buildifier from master branch and the command:
$ buildifier -r -lint fix -warnings all .

Change-Id: I52a18c09a1f192e2141f4156f9c1aabbbdbc910a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.http.test/BUILD

@@ -1,8 +1,8 @@
-load("@rules_java//java:defs.bzl", "java_library")
 load(
     "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
     "junit_tests",
 )
+load("@rules_java//java:defs.bzl", "java_library")
 
 junit_tests(
     name = "http",

org.eclipse.jgit.lfs.server.test/BUILD

@@ -1,8 +1,8 @@
-load("@rules_java//java:defs.bzl", "java_library")
 load(
     "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
     "junit_tests",
 )
+load("@rules_java//java:defs.bzl", "java_library")
 
 TEST_BASE = ["tst/org/eclipse/jgit/lfs/server/fs/LfsServerTest.java"]
 

org.eclipse.jgit.lfs.test/BUILD

@@ -1,9 +1,8 @@
-load("@rules_java//java:defs.bzl", "java_library")
-
 load(
     "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
     "junit_tests",
 )
+load("@rules_java//java:defs.bzl", "java_library")
 
 package(default_visibility = ["//visibility:public"])
 

org.eclipse.jgit.pgm.test/BUILD

@@ -1,8 +1,8 @@
-load("@rules_java//java:defs.bzl", "java_library")
 load(
     "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
     "junit_tests",
 )
+load("@rules_java//java:defs.bzl", "java_library")
 
 junit_tests(
     name = "pgm",

org.eclipse.jgit.test/BUILD

@@ -1,8 +1,8 @@
-load("@rules_java//java:defs.bzl", "java_import", "java_library")
 load(
     "@com_googlesource_gerrit_bazlets//tools:genrule2.bzl",
     "genrule2",
 )
+load("@rules_java//java:defs.bzl", "java_import", "java_library")
 load(":tests.bzl", "tests")
 
 PKG = "tst/org/eclipse/jgit/"

tools/BUILD

@@ -1,9 +1,9 @@
-load("@rules_java//java:defs.bzl", "java_package_configuration")
 load(
     "@bazel_tools//tools/jdk:default_java_toolchain.bzl",
     "JDK9_JVM_OPTS",
     "default_java_toolchain",
 )
+load("@rules_java//java:defs.bzl", "java_package_configuration")
 
 default_java_toolchain(
     name = "error_prone_warnings_toolchain",