Remove usage of commons-lang-2.3.1

[lizell]

We are seeing some build issues related to dexing with the now quite old lib commons-lang-2.3.1. I don't think it is even used in this package?

See

SifoInternetAndroidSDK/libmobiletagging/build.gradle

Line 39 in 7135265

implementation 'commons-lang:commons-lang:2.3'

Also, if I include it like this in our project:

    implementation('com.github.kantarsifo:SifoInternetAndroidSDK:4.0.1') {
        exclude module: 'commons-lang'
    }

the library still seems to work and the build problems are gone.