Fix certimport.sh to check for Bouncy Castle provider installation (and add 1.6 JDK to PATH)

Now if certimport.sh is run on a machine without the
BouncyCastleProvider installed, it will suggest how to apt-get install
the proper package.

At enh's suggestion, I tried running with out own local Bouncy Castle
classes to see what would happen, but the code ended up depending on
our NativeCrypto JNI code and there that isn't proper JNI code to be
loading into a RI JDK.

Also at enh's suggestion, we now prepend a JDK 1.6 bin directory to
the path for correctly correct default behavior. I do make sure it
exists and warn if it does not.

Change-Id: Ic936a6cc69fa3795e917c052ed79d19b2e66b5a1
1 file changed