Format BUILD files with buildifier

Using buildifier from master branch and the command:

$ buildifier -r -lint fix -warnings all .

Change-Id: I19c8ff183081093cb73bed7221a78a91b6cba4dc
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.http.test/BUILD

-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

-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.pgm.test/BUILD

-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

-load("@rules_java//java:defs.bzl", "java_import", "java_library")
-load(":tests.bzl", "tests")
 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/"