0.20.3-incubating-rc2

2a4f112 (HEAD -> release/0.20.3_incubating_rc2, tag: 0.20.3-incubating-rc2, upstream/release/0.20.3_incubating_rc2, upstream/master, master) Upgrading Bazel to 3.0.0 (#3510)
32d3051 (tag: 0.20.3-incubating-rc1, upstream/release/0.20.3_incubating_rc1, origin/master, origin/HEAD, release/0.20.3_incubating_rc1) Joshfischer/update site build (#3509)
c024da2 Fix snake yaml that caused unit test failures (#3506)
f90784a remove gitmodule file (#3508)
ed6fd81 Add an example with Streamlet API using component config (#3496)
0f27ef4 Fix style
9d77767 Use safe constructor in yaml deserialization
b069e45 Support custom metrics rules for PrometheusSink (#3493)
a6a4bf8 Travis CI update to Ubuntu 18.04 (#3497)
d2c5303 Fix copy Maven artifacts permission error (#3503)
c3d29a4 rolling back docusaurus version (#3501)
f76f479 fixstmgrcrash (#3492)
9ddbeb6 updating docs for compiling (#3483)
43c7c74 Update Debian docker build with JDK11 and correct debian version (#3487)
576e0c7 Joshfischer/debian10 java11 (#3481)
6846f70 Revert "Upgrade to Python3 (#3431)" (#3478)
ee1c44a Improve concurrency for needed parts. (#3107)
98a084a Add documents for setting up a docker based development environment (#3475)
a6ec96e Patch to fix cppcheck with newer glibc (#3471)
f0b6e1b Make log/sink/consume Streamlet component support setName and setNumPartitions (#3459)
1c59862 Update README for Java 11 (#3464)
4379fe1 Update website for java 11 (#3462)
1476076 Java 11 support (#3454)
0a6cecb adding examples folder to classpath (#3458)
db255f4 removing symlink. Adding contributing guidelines back (#3450)
783581b adding new committers (#3451)
d179c83 Bump mixin-deep from 1.3.1 to 1.3.2 in /website2/website (#3391)
c9d18e6 Add redirect from github pages to new apache site (#3448)
b22f442 remove old site (#3446)
d43f6bd Use netcat-bsd in Debian (#3447)
f7371e1 Added execute permission to dev-env-create.sh (#3443)
3b66e97 Improve docker dev env script (#3441)
b964cf4 explicitly making the site indexable (#3442)
0599224 Update license files for JSXTransformer.js (#3437)
7927299 add downloader-core filegroup (#3439)
91dbabf Updated to use default Kubernetes client discovery logic (#3432)
b16973a Updated rules_scala to fix https issue (#3436)
257b1a4 Upgrade to Python3 for the whole repo (#3431)
485b708 Updated Helm to 3.0.2 (#3430)
e51f265 Updated to support Kubernetes 1.16 (#3426)
2f0c1db update readme (#3429)
a745e3e Updates to make Zookeeper work (#3424)
5cd8ff9 Update getting-started-local-single-node.md (#3425)
cb8212f update bazel_config for Mac OS 10.14 (#3420)
367b44a Removing old com.twitter namespace references (#3415)
73f2487 Joshfischer/site build mods (#3422)
a565a6b Updated compile docker images to include tree package (#3423)
7ef2e15 Fix Helm values.yml typo (#3421)
869c82e make python code compatible with both python2 and python3 (#3412)
468aed1 Joshfischer/apache content (#3419)
340e654 Update zk version to 3.4.14 in dist and install zk in ubuntu 16/18 di… (#3411)
dcd1b92 Joshfischer/finalize-ci-website (#3418)
de8b554 joshfischer/asf site (#3414)
d8d811a Fix jQuery license and add missing license files (#3407)
06b5acc Update Kubernetes proxy URLs (#3405)
4bca2e5 BUG: bookie statefulset helm template specifies incorrect service name (#3410)
d8db1c5 Add parallelism calculator in Heron UI (#3401)
ae2d1f7 Make topology details section scrollable in Heron UI (#3400)
909c7a0 Support Catalina for Mac (#3398)
06a55e9 Re-organize UI elements in Heorn UI topology page (#3397)
bd06dc8 Update the instruction for using the docker based development environment (#3395)
1f5f23d Add tables for component running info (#3394)
135fb76 Helm chart Bookkeeper fix (#3381)
8045a30 Docker site (#3393)