zipkin: new package at v2.21.5 (#17780)

var/spack/repos/builtin/packages/zipkin/package.py

+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Zipkin(Package):
+    """Zipkin is a distributed tracing system. It helps gather timing
+    data needed to troubleshoot latency problems in service
+    architectures. Features include both the collection and lookup
+    of this data."""
+
+    homepage = "https://zipkin.io/"
+    url      = "https://github.com/openzipkin/zipkin/archive/2.21.5.tar.gz"
+
+    version('2.21.5', sha256='e643a810f82f9ea50e2cb6847694c7645507d3deae77685a3a1bb841e0f885a2')
+    version('2.21.4', sha256='ee7b0110b3852479c925b6429ff278aa38b1d5da27f4762891b1f863e67bdad5')
+    version('2.21.3', sha256='02526e2ba4de85938b510cb2db01865ec46cdad53157862c39fa5e9b6cbd15b6')
+
+    depends_on('maven', type='build')
+    depends_on('java', type=('build', 'run'))
+
+    def install(self, spec, prefix):
+        mvn = which('mvn')
+        mvn('package', '-DskipTests')
+        install_tree('.', prefix)