Config server /encrypt endpoint ignores "+" in keys during encryption

[atoregozh]

When trying to encrypt keys by POSTing to the /encrypt endpoint of config server I noticed that it ignores "+"s in keys and substitutes them with spaces.
Example:

• Leaving off the double quotes in encryption string doesn't change the output.
• When I use spring command line client, it encrypts and decrypts the values correctly.

[spencergibb]

You need to url encode the values. See #202