Fixes gh-1178

This reverts commit 67189477.

No need as picked up from the parent.

If an Endpoint is already @ManagedResource then it doesn't need
an additional (probably wrong) MBEan registration based on the invoke()
method.

The DataSourceInitializer is instantiated early by the
DataSourceInitializerPostProcessor, so it has to live in
isolation (in its own @Configuration) to prevent early
instantiation of the DataSourceAutoConfiguration.

Fixes gh-1166

Trying to fix the Windows CI build

Exception appears to be different on Windows JVMs

Fixes gh-1169

Fix 'fat jar' support for windows to correctly deal with URL and path
slash issues. The root cause of the original problem was caused by JAR
URLs not including a root slash (ie `file:C:/Users` vs `file:/C:/Users`)

Fixes gh-1145

Fixes gh-1168

Fixes gh-1148

Closes #1162

Closes #1161

Closes #1160

Closes #1159

Closes #1158

Closes #1157

Closes #1156

Closes #1155

Closes #1154

Closes #1153

Closes #1152

Closes #1151

Closes #1150

Update ExecutableArchiveLauncher so that `-cp` URLs are not added
when they are already contained as nested JARs. This prevents a
SecurityException "signer information does not match error" when using
signed jars. The root cause of the issue was that the primary JAR file
was on the default classpath with the URL "file:....jar" and in the
main URL set as "jar:file:....jar". It is now filtered so that only
the "jar:" variant is added.

Fixes gh-1134