Adds a junit test integration test, including coverage options.

(Is cobertura working? I don't see any output in the cobertura reports.)

Testing Done:
ci is running.

Bugs closed: 675

Reviewed at https://rbcommons.com/s/twitter/r/1161/
(Adds missing fixes from new junit test integration test,  https://rbcommons.com/s/twitter/r/1161/)
Switch travis email notifications back to the default.

Emails now go to author (+comitter).

 .travis.yml                  | 14 ++++----------
 build-support/bin/ci-sync.sh |  5 +++--
 2 files changed, 7 insertions(+), 12 deletions(-)

Testing Done:
$ travis lint
Hooray, .travis.yml looks valid :)

And CI went green here: https://travis-ci.org/pantsbuild/pants/builds/38073663

I enabled ci for my pantsbuild/pants fork and I added a commit of this:
```console
$ cat << EOF > build-support/bin/ci.sh
#!/usr/bin/env bash
exit 1
EOF
```
That CI went red and emailed just me for both the pantsbuild/pants and jsirois/pants jobs:
  https://travis-ci.org/jsirois/pants/builds/38087136

Email to just me:
 jsirois / pants (jsirois/travis/email_simple)

Build #4 is still failing.	 38 seconds
	John Sirois	f727f99 Changeset →
 	Small workding fixes.

Bugs closed: 682

Reviewed at https://rbcommons.com/s/twitter/r/1169/
When resolving a tool dep, report back the pants.ini section with a reference that is failing.
Added a convenience method to pull a dependency list from pants.ini and   report the section/key info along to register_jvm_tool()

Testing Done:
ci is baking.

Manual Testing:

1) renamed target 3rdparty:protobuf-2.4.1 to 3rdparty:protobuf-2.4.2 and ran example protobuf compile.

``
$ ./pants goal compile examples/src/java/com/pants/examples/protobuf/distance
  ...
Exception message: protobuf-2.4.1 was not found in BUILD file /Users/zundel/Src/Pants/3rdparty/BUILD. Perhaps you meant one of:
  :checkstyle
  ...
  :util-core
  referenced from [protobuf-gen] key: javadeps in pants.ini
```

2) In BUILD.tools, I renamed '//:jar-tool to //:jar-tool2

```
$ ./pants goal bundle examples/src/java/com/pants/examples/hello/main
  ...
                     Failed to resolve target for bootstrap tool: //:jar-tool. You probably need to add this dep to your tools BUILD file(s), usually located in the root of the build.
                     See pants.ini section: [jar-tool] key: bootstrap-tools
                     Error: jar-tool was not found in BUILD file /Users/zundel/Src/Pants/BUILD. Perhaps you meant one of:
                       BUILD:readme
                       ...
                       BUILD.tools:zinc

```

Bugs closed: 676

Reviewed at https://rbcommons.com/s/twitter/r/1162/
Relabel the thrift_linter test to an integration test

test_thrift_linter is actually an integration test.  It is fast for an integration test, but slow as a unit test.

Testing Done:
ci si running

Bugs closed: 684

Reviewed at https://rbcommons.com/s/twitter/r/1171/
Refactor jar_library to be able to unwrap its list of jar_dependency objects

This change is intended to support the external_archive() sharing the same logic as java_protobuf_library() for processing
a list of addresses to JarLibrary targets.

Testing Done:
Added new unit test for new method in test_jvm_target
Also beefed up the test_jar_library unit test

CI is running

Bugs closed: 680

Reviewed at https://rbcommons.com/s/twitter/r/1165/
Missed some style comments from code reviews earlier today, trying to clean up.

Missed some style comments from code reviews yesterday, trying to clean up.

Testing Done:
CI passed.

Bugs closed: 686

Reviewed at https://rbcommons.com/s/twitter/r/1174/
Move registration of --no-pantsrc to global_options.py to resurrect it

It's a bit of a special case since it is used before the options are parsed. I left that part as is.

Testing Done:
Manual

Reviewed at https://rbcommons.com/s/twitter/r/1170/
Ensure new options values are always properly typed.

Previously values read from pants.ini were always strings.

Amend the relevant unit test to detect a regression of this.

Testing Done:
Fixed the test, then ran it before and after the fix.

ci baking.

Reviewed at https://rbcommons.com/s/twitter/r/1175/