Address Checkstyle violations
Reset StringBuilder instead of creating new ones

This avoids unneeded garbage, especially during XML parsing.  Replaced
with:

find -name \*.java | xargs sed -i 's/^\( *[^ ]*\) = new StringBuilder();$/\1.setLength(0);/'
OpenStack Cinder general cleanup. Prefer ByteSourcePayload.
Avoid duplicated info and just link to website
JCLOUDS-653: Upgrade to Guava 18.0-rc1

Release notes:

https://code.google.com/p/guava-libraries/wiki/Release18
JCLOUDS-653: Address Guava 18 deprecations

Mostly renaming Objects.toStringHelper to MoreObjects.toStringHelper.
JCLOUDS-653: correct mock expectation
JCLOUDS-622: Remove last vestiges of InputSupplier

Guava 16 deprecated InputSupplier and a future release will remove it.
Parse Swift authentication headers case-insensitively

Also ensure they are added to the result object with the normalized
capitalization expected by downstream code.

Follow-up to 375cb207.
Revert "Parse Swift authentication headers case-insensitively"

Missing JIRA issue number.

This reverts commit e532e6f260c6070673ed9bb87294c4596e9e8b88.
JCLOUDS-656: Parse Swift authentication headers case-insensitively

Also ensure they are added to the result object with the normalized
capitalization expected by downstream code.

Follow-up to 375cb207.
JCLOUDS-650: ContainerNotFoundException on putBlob

Found with Ceph s3-tests and s3proxy.
JCLOUDS-652: Require JDK 7

Moving to Java 7 allows jclouds to use more language and library
features such as try-with-resources and HTTP client improvements.
JCLOUDS-264: Allow payloads greater than 2 GB

Enabled by JDK 7.
Addressing Checkstyle violation

Introduced in 7e4cacf
Remove maven.compile.optimize

This setting has no effect.  Reference:

http://stackoverflow.com/questions/4218721/optimizing-java-compiler-during-a-maven-build
Enforce ASF copyright header via Checkstyle
Remove maven-license-plugin

This never seemed to work and we will enforce license text via
Checkstyle instead.
fix ASF copyright headers on SoftLayer
Remove Java 6 litter